909191012 has 12 divisors (see below), whose sum is σ = 1660262016. Its totient is φ = 434830440.

The previous prime is 909190993. The next prime is 909191027. The reversal of 909191012 is 210191909.

It is a self number, because there is not a number n which added to its sum of digits gives 909191012.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4941164 + ... + 4941347.

It is an arithmetic number, because the mean of its divisors is an integer number (138355168).

Almost surely, 2^909191012 is an apocalyptic number.

909191012 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

909191012 is a deficient number, since it is larger than the sum of its proper divisors (751071004).

909191012 is a wasteful number, since it uses less digits than its factorization.

909191012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9882538 (or 9882536 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 32.

The square root of 909191012 is about 30152.7944310308. The cubic root of 909191012 is about 968.7648614744.

The spelling of 909191012 in words is "nine hundred nine million, one hundred ninety-one thousand, twelve".