90777457 has 4 divisors (see below), whose sum is σ = 90927616. Its totient is φ = 90627300.

The previous prime is 90777451. The next prime is 90777469. The reversal of 90777457 is 75477709.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90777457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90777451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74169 + ... + 75382.

It is an arithmetic number, because the mean of its divisors is an integer number (22731904).

Almost surely, 2^90777457 is an apocalyptic number.

It is an amenable number.

90777457 is a deficient number, since it is larger than the sum of its proper divisors (150159).

90777457 is a wasteful number, since it uses less digits than its factorization.

90777457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150158.

The product of its (nonzero) digits is 432180, while the sum is 46.

The square root of 90777457 is about 9527.7204513986. The cubic root of 90777457 is about 449.4271839149.

The spelling of 90777457 in words is "ninety million, seven hundred seventy-seven thousand, four hundred fifty-seven".