90360591 has 4 divisors (see below), whose sum is σ = 120480792. Its totient is φ = 60240392.

The previous prime is 90360577. The next prime is 90360631. The reversal of 90360591 is 19506309.

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

It is a cyclic number.

It is not a de Polignac number, because 90360591 - 2⁷ = 90360463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90360511) 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, 15060096 + ... + 15060101.

It is an arithmetic number, because the mean of its divisors is an integer number (30120198).

Almost surely, 2^90360591 is an apocalyptic number.

90360591 is a deficient number, since it is larger than the sum of its proper divisors (30120201).

90360591 is a wasteful number, since it uses less digits than its factorization.

90360591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30120200.

The product of its (nonzero) digits is 7290, while the sum is 33.

The square root of 90360591 is about 9505.8187969264. The cubic root of 90360591 is about 448.7381786806.

It can be divided in two parts, 90360 and 591, that added together give a triangular number (90951 = T₄₂₆).

The spelling of 90360591 in words is "ninety million, three hundred sixty thousand, five hundred ninety-one".