29939316123 has 4 divisors (see below), whose sum is σ = 39919088168. Its totient is φ = 19959544080.

The previous prime is 29939316107. The next prime is 29939316157. The reversal of 29939316123 is 32161393992.

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

It is not a de Polignac number, because 29939316123 - 2⁴ = 29939316107 is a prime.

It is a super-2 number, since 2×29939316123² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29939316193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4989886018 + ... + 4989886023.

It is an arithmetic number, because the mean of its divisors is an integer number (9979772042).

Almost surely, 2^29939316123 is an apocalyptic number.

29939316123 is a deficient number, since it is larger than the sum of its proper divisors (9979772045).

29939316123 is an equidigital number, since it uses as much as digits as its factorization.

29939316123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9979772044.

The product of its digits is 472392, while the sum is 48.

The spelling of 29939316123 in words is "twenty-nine billion, nine hundred thirty-nine million, three hundred sixteen thousand, one hundred twenty-three".