91422513 has 80 divisors (see below), whose sum is σ = 171297280. Its totient is φ = 47309184.

The previous prime is 91422479. The next prime is 91422533. The reversal of 91422513 is 31522419.

91422513 is a `hidden beast` number, since 9 + 142 + 2 + 513 = 666.

It is not a de Polignac number, because 91422513 - 2¹⁰ = 91421489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (91422533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 582231 + ... + 582387.

It is an arithmetic number, because the mean of its divisors is an integer number (2141216).

Almost surely, 2^91422513 is an apocalyptic number.

It is an amenable number.

91422513 is a deficient number, since it is larger than the sum of its proper divisors (79874767).

91422513 is a wasteful number, since it uses less digits than its factorization.

91422513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268 (or 259 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 91422513 is about 9561.5120666137. The cubic root of 91422513 is about 450.4892013230.

The spelling of 91422513 in words is "ninety-one million, four hundred twenty-two thousand, five hundred thirteen".