29672161 has 4 divisors (see below), whose sum is σ = 29795524. Its totient is φ = 29548800.

The previous prime is 29672143. The next prime is 29672179. The reversal of 29672161 is 16127692.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (29672143) and next prime (29672179).

It can be written as a sum of positive squares in 2 ways, for example, as 24196561 + 5475600 = 4919^2 + 2340^2 .

It is a cyclic number.

It is not a de Polignac number, because 29672161 - 2⁷ = 29672033 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29672101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61320 + ... + 61801.

It is an arithmetic number, because the mean of its divisors is an integer number (7448881).

Almost surely, 2^29672161 is an apocalyptic number.

It is an amenable number.

29672161 is a deficient number, since it is larger than the sum of its proper divisors (123363).

29672161 is a wasteful number, since it uses less digits than its factorization.

29672161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123362.

The product of its digits is 9072, while the sum is 34.

The square root of 29672161 is about 5447.2158943813. The cubic root of 29672161 is about 309.5872446376.

The spelling of 29672161 in words is "twenty-nine million, six hundred seventy-two thousand, one hundred sixty-one".