91145902 has 16 divisors (see below), whose sum is σ = 141218640. Its totient is φ = 44096832.

The previous prime is 91145897. The next prime is 91145903. The reversal of 91145902 is 20954119.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91145903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1849 + ... + 13627.

It is an arithmetic number, because the mean of its divisors is an integer number (8826165).

Almost surely, 2^91145902 is an apocalyptic number.

91145902 is a deficient number, since it is larger than the sum of its proper divisors (50072738).

91145902 is a wasteful number, since it uses less digits than its factorization.

91145902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11907.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 91145902 is about 9547.0362940548. The cubic root of 91145902 is about 450.0344039540.

The spelling of 91145902 in words is "ninety-one million, one hundred forty-five thousand, nine hundred two".