29992921 has 8 divisors (see below), whose sum is σ = 34458624. Its totient is φ = 25572480.

The previous prime is 29992901. The next prime is 29992939. The reversal of 29992921 is 12929992.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 29992921 - 2⁵ = 29992889 is a prime.

It is a super-2 number, since 2×29992921² = 1799150620224482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29992901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9880 + ... + 12553.

It is an arithmetic number, because the mean of its divisors is an integer number (4307328).

Almost surely, 2^29992921 is an apocalyptic number.

It is an amenable number.

29992921 is a deficient number, since it is larger than the sum of its proper divisors (4465703).

29992921 is a wasteful number, since it uses less digits than its factorization.

29992921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22631.

The product of its digits is 52488, while the sum is 43.

The square root of 29992921 is about 5476.5793155947. The cubic root of 29992921 is about 310.6988085629.

The spelling of 29992921 in words is "twenty-nine million, nine hundred ninety-two thousand, nine hundred twenty-one".