91953128 has 8 divisors (see below), whose sum is σ = 172412130. Its totient is φ = 45976560.

The previous prime is 91953083. The next prime is 91953131. The reversal of 91953128 is 82135919.

It can be written as a sum of positive squares in only one way, i.e., 91431844 + 521284 = 9562^2 + 722^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 91953091 and 91953100.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5747063 + ... + 5747078.

Almost surely, 2^91953128 is an apocalyptic number.

It is an amenable number.

91953128 is a deficient number, since it is larger than the sum of its proper divisors (80459002).

91953128 is a wasteful number, since it uses less digits than its factorization.

91953128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11494147 (or 11494143 counting only the distinct ones).

The product of its digits is 19440, while the sum is 38.

The square root of 91953128 is about 9589.2193634310. The cubic root of 91953128 is about 451.3590649581.

The spelling of 91953128 in words is "ninety-one million, nine hundred fifty-three thousand, one hundred twenty-eight".