91520494 has 32 divisors (see below), whose sum is σ = 153538560. Its totient is φ = 40629600.

The previous prime is 91520479. The next prime is 91520497. The reversal of 91520494 is 49402519.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91520497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218217 + ... + 218635.

It is an arithmetic number, because the mean of its divisors is an integer number (4798080).

Almost surely, 2^91520494 is an apocalyptic number.

91520494 is a deficient number, since it is larger than the sum of its proper divisors (62018066).

91520494 is a wasteful number, since it uses less digits than its factorization.

91520494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 91520494 is about 9566.6344134183. The cubic root of 91520494 is about 450.6500793597.

The spelling of 91520494 in words is "ninety-one million, five hundred twenty thousand, four hundred ninety-four".