91280577 has 8 divisors (see below), whose sum is σ = 122160960. Its totient is φ = 60626960.

The previous prime is 91280569. The next prime is 91280597. The reversal of 91280577 is 77508219.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91280577 - 2³ = 91280569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91280507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55749 + ... + 57362.

It is an arithmetic number, because the mean of its divisors is an integer number (15270120).

Almost surely, 2^91280577 is an apocalyptic number.

It is an amenable number.

91280577 is a deficient number, since it is larger than the sum of its proper divisors (30880383).

91280577 is a wasteful number, since it uses less digits than its factorization.

91280577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113383.

The product of its (nonzero) digits is 35280, while the sum is 39.

The square root of 91280577 is about 9554.0869265461. The cubic root of 91280577 is about 450.2559482229.

The spelling of 91280577 in words is "ninety-one million, two hundred eighty thousand, five hundred seventy-seven".