91249960 has 16 divisors (see below), whose sum is σ = 205312500. Its totient is φ = 36499968.

The previous prime is 91249943. The next prime is 91249967. The reversal of 91249960 is 6994219.

It can be written as a sum of positive squares in 2 ways, for example, as 89756676 + 1493284 = 9474^2 + 1222^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 2281249 = 91249960 / (9 + 1 + 2 + 4 + 9 + 9 + 6 + 0).

It is not an unprimeable number, because it can be changed into a prime (91249967) 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, 1140585 + ... + 1140664.

Almost surely, 2^91249960 is an apocalyptic number.

It is an amenable number.

91249960 is an abundant number, since it is smaller than the sum of its proper divisors (114062540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91249960 is a wasteful number, since it uses less digits than its factorization.

91249960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2281260 (or 2281256 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 91249960 is about 9552.4844935755. The cubic root of 91249960 is about 450.2056015212.

The spelling of 91249960 in words is "ninety-one million, two hundred forty-nine thousand, nine hundred sixty".