91274865 has 16 divisors (see below), whose sum is σ = 159316416. Its totient is φ = 44254400.

The previous prime is 91274863. The next prime is 91274873. The reversal of 91274865 is 56847219.

It is not a de Polignac number, because 91274865 - 2¹ = 91274863 is a prime.

It is a super-2 number, since 2×91274865² = 16662201961536450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91274863) 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, 276426 + ... + 276755.

It is an arithmetic number, because the mean of its divisors is an integer number (9957276).

Almost surely, 2^91274865 is an apocalyptic number.

It is an amenable number.

91274865 is a deficient number, since it is larger than the sum of its proper divisors (68041551).

91274865 is a wasteful number, since it uses less digits than its factorization.

91274865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553200.

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

The square root of 91274865 is about 9553.7879922050. The cubic root of 91274865 is about 450.2465562445.

The spelling of 91274865 in words is "ninety-one million, two hundred seventy-four thousand, eight hundred sixty-five".