90487977 has 16 divisors (see below), whose sum is σ = 127913472. Its totient is φ = 56799360.

The previous prime is 90487973. The next prime is 90487981. The reversal of 90487977 is 77978409.

It is an interprime number because it is at equal distance from previous prime (90487973) and next prime (90487981).

It is not a de Polignac number, because 90487977 - 2² = 90487973 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90487973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9708 + ... + 16589.

It is an arithmetic number, because the mean of its divisors is an integer number (7994592).

Almost surely, 2^90487977 is an apocalyptic number.

It is an amenable number.

90487977 is a deficient number, since it is larger than the sum of its proper divisors (37425495).

90487977 is a wasteful number, since it uses less digits than its factorization.

90487977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26368.

The product of its (nonzero) digits is 889056, while the sum is 51.

The square root of 90487977 is about 9512.5168593806. The cubic root of 90487977 is about 448.9489494755.

The spelling of 90487977 in words is "ninety million, four hundred eighty-seven thousand, nine hundred seventy-seven".