91560427 has 4 divisors (see below), whose sum is σ = 104640496. Its totient is φ = 78480360.

The previous prime is 91560409. The next prime is 91560431. The reversal of 91560427 is 72406519.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72406519 = 17 ⋅4259207.

It is a de Polignac number, because none of the positive numbers 2^k-91560427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91560392 and 91560401.

It is not an unprimeable number, because it can be changed into a prime (91560457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6540024 + ... + 6540037.

It is an arithmetic number, because the mean of its divisors is an integer number (26160124).

Almost surely, 2^91560427 is an apocalyptic number.

91560427 is a deficient number, since it is larger than the sum of its proper divisors (13080069).

91560427 is a wasteful number, since it uses less digits than its factorization.

91560427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13080068.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 91560427 is about 9568.7212834318. The cubic root of 91560427 is about 450.7156136537.

The spelling of 91560427 in words is "ninety-one million, five hundred sixty thousand, four hundred twenty-seven".