29191939091 has 12 divisors (see below), whose sum is σ = 33989100912. Its totient is φ = 24998723568.

The previous prime is 29191939067. The next prime is 29191939123. The reversal of 29191939091 is 19093919192.

It is not a de Polignac number, because 29191939091 - 2¹⁸ = 29191676947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29191939031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 218975 + ... + 326088.

It is an arithmetic number, because the mean of its divisors is an integer number (2832425076).

Almost surely, 2^29191939091 is an apocalyptic number.

29191939091 is a deficient number, since it is larger than the sum of its proper divisors (4797161821).

29191939091 is a wasteful number, since it uses less digits than its factorization.

29191939091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546170 (or 546163 counting only the distinct ones).

The product of its (nonzero) digits is 354294, while the sum is 53.

The spelling of 29191939091 in words is "twenty-nine billion, one hundred ninety-one million, nine hundred thirty-nine thousand, ninety-one".