90687567 has 4 divisors (see below), whose sum is σ = 120916760. Its totient is φ = 60458376.

The previous prime is 90687563. The next prime is 90687593. The reversal of 90687567 is 76578609.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76578609 = 3 ⋅25526203.

It is not a de Polignac number, because 90687567 - 2² = 90687563 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90687563) 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, 15114592 + ... + 15114597.

It is an arithmetic number, because the mean of its divisors is an integer number (30229190).

Almost surely, 2^90687567 is an apocalyptic number.

90687567 is a deficient number, since it is larger than the sum of its proper divisors (30229193).

90687567 is a wasteful number, since it uses less digits than its factorization.

90687567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30229192.

The product of its (nonzero) digits is 635040, while the sum is 48.

The square root of 90687567 is about 9523.0019951694. The cubic root of 90687567 is about 449.2787904226.

The spelling of 90687567 in words is "ninety million, six hundred eighty-seven thousand, five hundred sixty-seven".