3649161 has 4 divisors (see below), whose sum is σ = 4865552. Its totient is φ = 2432772.

The previous prime is 3649153. The next prime is 3649181. The reversal of 3649161 is 1619463.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 3649161 - 2³ = 3649153 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3649181) 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 3 ways as a sum of consecutive naturals, for example, 608191 + ... + 608196.

It is an arithmetic number, because the mean of its divisors is an integer number (1216388).

Almost surely, 2^3649161 is an apocalyptic number.

It is an amenable number.

3649161 is a deficient number, since it is larger than the sum of its proper divisors (1216391).

3649161 is a wasteful number, since it uses less digits than its factorization.

3649161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1216390.

The product of its digits is 3888, while the sum is 30.

The square root of 3649161 is about 1910.2777284992. The cubic root of 3649161 is about 153.9563743296.

The spelling of 3649161 in words is "three million, six hundred forty-nine thousand, one hundred sixty-one".