91671672 has 32 divisors (see below), whose sum is σ = 230648400. Its totient is φ = 30361344.

The previous prime is 91671661. The next prime is 91671683. The reversal of 91671672 is 27617619.

It is an interprime number because it is at equal distance from previous prime (91671661) and next prime (91671683).

It is a self number, because there is not a number n which added to its sum of digits gives 91671672.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8397 + ... + 15932.

Almost surely, 2^91671672 is an apocalyptic number.

It is an amenable number.

91671672 is an abundant number, since it is smaller than the sum of its proper divisors (138976728).

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

91671672 is a wasteful number, since it uses less digits than its factorization.

91671672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24495 (or 24491 counting only the distinct ones).

The product of its digits is 31752, while the sum is 39.

The square root of 91671672 is about 9574.5324690034. The cubic root of 91671672 is about 450.8980780920.

The spelling of 91671672 in words is "ninety-one million, six hundred seventy-one thousand, six hundred seventy-two".