90477565 has 4 divisors (see below), whose sum is σ = 108573084. Its totient is φ = 72382048.

The previous prime is 90477559. The next prime is 90477571. The reversal of 90477565 is 56577409.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (90477559) and next prime (90477571).

It can be written as a sum of positive squares in 2 ways, for example, as 14055001 + 76422564 = 3749^2 + 8742^2 .

It is a cyclic number.

It is not a de Polignac number, because 90477565 - 2²³ = 82088957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9047752 + ... + 9047761.

It is an arithmetic number, because the mean of its divisors is an integer number (27143271).

Almost surely, 2^90477565 is an apocalyptic number.

It is an amenable number.

90477565 is a deficient number, since it is larger than the sum of its proper divisors (18095519).

90477565 is a wasteful number, since it uses less digits than its factorization.

90477565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18095518.

The product of its (nonzero) digits is 264600, while the sum is 43.

The square root of 90477565 is about 9511.9695647116. The cubic root of 90477565 is about 448.9317293765.

The spelling of 90477565 in words is "ninety million, four hundred seventy-seven thousand, five hundred sixty-five".