91264857 has 16 divisors (see below), whose sum is σ = 129084480. Its totient is φ = 57157632.

The previous prime is 91264843. The next prime is 91264861. The reversal of 91264857 is 75846219.

It is not a de Polignac number, because 91264857 - 2¹⁰ = 91263833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91264807) 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, 32994 + ... + 35652.

It is an arithmetic number, because the mean of its divisors is an integer number (8067780).

Almost surely, 2^91264857 is an apocalyptic number.

It is an amenable number.

91264857 is a deficient number, since it is larger than the sum of its proper divisors (37819623).

91264857 is a wasteful number, since it uses less digits than its factorization.

91264857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3352.

The product of its digits is 120960, while the sum is 42.

The square root of 91264857 is about 9553.2642065422. The cubic root of 91264857 is about 450.2300996065.

The spelling of 91264857 in words is "ninety-one million, two hundred sixty-four thousand, eight hundred fifty-seven".