91475986 has 32 divisors (see below), whose sum is σ = 161336448. Its totient is φ = 38088960.

The previous prime is 91475983. The next prime is 91475987. The reversal of 91475986 is 68957419.

It is not an unprimeable number, because it can be changed into a prime (91475983) 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, 83301 + ... + 84391.

It is an arithmetic number, because the mean of its divisors is an integer number (5041764).

Almost surely, 2^91475986 is an apocalyptic number.

91475986 is a deficient number, since it is larger than the sum of its proper divisors (69860462).

91475986 is a wasteful number, since it uses less digits than its factorization.

91475986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266.

The product of its digits is 544320, while the sum is 49.

The square root of 91475986 is about 9564.3079205973. The cubic root of 91475986 is about 450.5770145368.

The spelling of 91475986 in words is "ninety-one million, four hundred seventy-five thousand, nine hundred eighty-six".