29956858889 has 4 divisors (see below), whose sum is σ = 30464602320. Its totient is φ = 29449115460.

The previous prime is 29956858859. The next prime is 29956858901. The reversal of 29956858889 is 98885865992.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29956858889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29956858849) 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, 253871627 + ... + 253871744.

It is an arithmetic number, because the mean of its divisors is an integer number (7616150580).

Almost surely, 2^29956858889 is an apocalyptic number.

It is an amenable number.

29956858889 is a deficient number, since it is larger than the sum of its proper divisors (507743431).

29956858889 is an equidigital number, since it uses as much as digits as its factorization.

29956858889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507743430.

The product of its digits is 895795200, while the sum is 77.

The spelling of 29956858889 in words is "twenty-nine billion, nine hundred fifty-six million, eight hundred fifty-eight thousand, eight hundred eighty-nine".