90459591 has 8 divisors (see below), whose sum is σ = 121114224. Its totient is φ = 60055680.

The previous prime is 90459563. The next prime is 90459599. The reversal of 90459591 is 19595409.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90459591 - 2⁷ = 90459463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90459599) 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, 61836 + ... + 63281.

It is an arithmetic number, because the mean of its divisors is an integer number (15139278).

Almost surely, 2^90459591 is an apocalyptic number.

90459591 is a deficient number, since it is larger than the sum of its proper divisors (30654633).

90459591 is a wasteful number, since it uses less digits than its factorization.

90459591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125361.

The product of its (nonzero) digits is 72900, while the sum is 42.

The square root of 90459591 is about 9511.0247082005. The cubic root of 90459591 is about 448.9019996003.

The spelling of 90459591 in words is "ninety million, four hundred fifty-nine thousand, five hundred ninety-one".