91010902 has 16 divisors (see below), whose sum is σ = 139089312. Its totient is φ = 44651520.

The previous prime is 91010897. The next prime is 91010917. The reversal of 91010902 is 20901019.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78358 + ... + 79510.

It is an arithmetic number, because the mean of its divisors is an integer number (8693082).

Almost surely, 2^91010902 is an apocalyptic number.

91010902 is a deficient number, since it is larger than the sum of its proper divisors (48078410).

91010902 is a wasteful number, since it uses less digits than its factorization.

91010902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1863.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 91010902 is about 9539.9634171206. The cubic root of 91010902 is about 449.8121059193.

The spelling of 91010902 in words is "ninety-one million, ten thousand, nine hundred two".