29117893887 has 12 divisors (see below), whose sum is σ = 42061989424. Its totient is φ = 19410632640.

The previous prime is 29117893841. The next prime is 29117893919. The reversal of 29117893887 is 78839871192.

It is not a de Polignac number, because 29117893887 - 2⁶ = 29117893823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29117893817) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45687 + ... + 245607.

Almost surely, 2^29117893887 is an apocalyptic number.

29117893887 is a deficient number, since it is larger than the sum of its proper divisors (12944095537).

29117893887 is a wasteful number, since it uses less digits than its factorization.

29117893887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216110 (or 216107 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 63.

The spelling of 29117893887 in words is "twenty-nine billion, one hundred seventeen million, eight hundred ninety-three thousand, eight hundred eighty-seven".