91687960 has 64 divisors (see below), whose sum is σ = 253915200. Its totient is φ = 29016576.

The previous prime is 91687951. The next prime is 91687963. The reversal of 91687960 is 6978619.

It is a self number, because there is not a number n which added to its sum of digits gives 91687960.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91687963) 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, 8955 + ... + 16234.

It is an arithmetic number, because the mean of its divisors is an integer number (3967425).

Almost surely, 2^91687960 is an apocalyptic number.

It is an amenable number.

91687960 is an abundant number, since it is smaller than the sum of its proper divisors (162227240).

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

91687960 is a wasteful number, since it uses less digits than its factorization.

91687960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25220 (or 25216 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 91687960 is about 9575.3830210598. The cubic root of 91687960 is about 450.9247813357.

The spelling of 91687960 in words is "ninety-one million, six hundred eighty-seven thousand, nine hundred sixty".