91474868 has 24 divisors (see below), whose sum is σ = 163505160. Its totient is φ = 44766720.

The previous prime is 91474861. The next prime is 91474879. The reversal of 91474868 is 86847419.

It can be written as a sum of positive squares in 4 ways, for example, as 5579044 + 85895824 = 2362^2 + 9268^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91474861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56048 + ... + 57656.

It is an arithmetic number, because the mean of its divisors is an integer number (6812715).

Almost surely, 2^91474868 is an apocalyptic number.

It is an amenable number.

91474868 is a deficient number, since it is larger than the sum of its proper divisors (72030292).

91474868 is a wasteful number, since it uses less digits than its factorization.

91474868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1907 (or 1905 counting only the distinct ones).

The product of its digits is 387072, while the sum is 47.

The square root of 91474868 is about 9564.2494739525. The cubic root of 91474868 is about 450.5751789106.

The spelling of 91474868 in words is "ninety-one million, four hundred seventy-four thousand, eight hundred sixty-eight".