91770632 has 16 divisors (see below), whose sum is σ = 172243260. Its totient is φ = 45839104.

The previous prime is 91770617. The next prime is 91770647. The reversal of 91770632 is 23607719.

It is an interprime number because it is at equal distance from previous prime (91770617) and next prime (91770647).

It can be written as a sum of positive squares in 2 ways, for example, as 90364036 + 1406596 = 9506^2 + 1186^2 .

It is a junction number, because it is equal to n+sod(n) for n = 91770592 and 91770601.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3548 + ... + 14004.

Almost surely, 2^91770632 is an apocalyptic number.

It is an amenable number.

91770632 is a deficient number, since it is larger than the sum of its proper divisors (80472628).

91770632 is a wasteful number, since it uses less digits than its factorization.

91770632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11560 (or 11556 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 35.

The square root of 91770632 is about 9579.6989514285. The cubic root of 91770632 is about 451.0602686078.

The spelling of 91770632 in words is "ninety-one million, seven hundred seventy thousand, six hundred thirty-two".