3291661129 has 3 divisors (see below), whose sum is σ = 3291718503. Its totient is φ = 3291603756.

The previous prime is 3291661117. The next prime is 3291661183. The reversal of 3291661129 is 9211661923.

The square root of 3291661129 is 57373.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9211661923 = 223 ⋅41307901.

It can be written as a sum of positive squares in only one way, i.e., 3126487225 + 165173904 = 55915^2 + 12852^2 .

It is not a de Polignac number, because 3291661129 - 2¹³ = 3291652937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3291661091 and 3291661100.

It is not an unprimeable number, because it can be changed into a prime (3291661829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 28687 + ... + 86059.

It is an arithmetic number, because the mean of its divisors is an integer number (1097239501).

Almost surely, 2^3291661129 is an apocalyptic number.

3291661129 is the 57373-rd square number.

3291661129 is the 28687-th centered octagonal number.

It is an amenable number.

3291661129 is a deficient number, since it is larger than the sum of its proper divisors (57374).

3291661129 is an frugal number, since it uses more digits than its factorization.

3291661129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114746 (or 57373 counting only the distinct ones).

The product of its digits is 34992, while the sum is 40.

The cubic root of 3291661129 is about 1487.5504590750.

The spelling of 3291661129 in words is "three billion, two hundred ninety-one million, six hundred sixty-one thousand, one hundred twenty-nine".