91490577 has 8 divisors (see below), whose sum is σ = 123808416. Its totient is φ = 60083232.

The previous prime is 91490569. The next prime is 91490591. The reversal of 91490577 is 77509419.

It is a happy number.

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

It is not a de Polignac number, because 91490577 - 2³ = 91490569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91490507) 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, 227388 + ... + 227789.

It is an arithmetic number, because the mean of its divisors is an integer number (15476052).

Almost surely, 2^91490577 is an apocalyptic number.

It is an amenable number.

91490577 is a deficient number, since it is larger than the sum of its proper divisors (32317839).

91490577 is a wasteful number, since it uses less digits than its factorization.

91490577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455247.

The product of its (nonzero) digits is 79380, while the sum is 42.

The square root of 91490577 is about 9565.0706740724. The cubic root of 91490577 is about 450.6009698937.

The spelling of 91490577 in words is "ninety-one million, four hundred ninety thousand, five hundred seventy-seven".