29990923 has 8 divisors (see below), whose sum is σ = 30523392. Its totient is φ = 29463336.

The previous prime is 29990903. The next prime is 29990927. The reversal of 29990923 is 32909992.

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 29990923 - 2²¹ = 27893771 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 29990923.

It is not an unprimeable number, because it can be changed into a prime (29990927) 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, 12486 + ... + 14692.

It is an arithmetic number, because the mean of its divisors is an integer number (3815424).

Almost surely, 2^29990923 is an apocalyptic number.

29990923 is a deficient number, since it is larger than the sum of its proper divisors (532469).

29990923 is a wasteful number, since it uses less digits than its factorization.

29990923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2441.

The product of its (nonzero) digits is 78732, while the sum is 43.

The square root of 29990923 is about 5476.3968994221. The cubic root of 29990923 is about 310.6919092682.

The spelling of 29990923 in words is "twenty-nine million, nine hundred ninety thousand, nine hundred twenty-three".