90877491 has 8 divisors (see below), whose sum is σ = 134633360. Its totient is φ = 60584976.

The previous prime is 90877487. The next prime is 90877499. The reversal of 90877491 is 19477809.

90877491 is a `hidden beast` number, since 90 + 8 + 77 + 491 = 666.

It is not a de Polignac number, because 90877491 - 2² = 90877487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90877499) 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, 1682890 + ... + 1682943.

It is an arithmetic number, because the mean of its divisors is an integer number (16829170).

Almost surely, 2^90877491 is an apocalyptic number.

90877491 is a deficient number, since it is larger than the sum of its proper divisors (43755869).

90877491 is a wasteful number, since it uses less digits than its factorization.

90877491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3365842 (or 3365836 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 90877491 is about 9532.9686352154. The cubic root of 90877491 is about 449.5922083471.

The spelling of 90877491 in words is "ninety million, eight hundred seventy-seven thousand, four hundred ninety-one".