90132791 has 8 divisors (see below), whose sum is σ = 107487744. Its totient is φ = 73897560.

The previous prime is 90132781. The next prime is 90132799. The reversal of 90132791 is 19723109.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90132791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90132799) 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, 279755 + ... + 280076.

It is an arithmetic number, because the mean of its divisors is an integer number (13435968).

Almost surely, 2^90132791 is an apocalyptic number.

90132791 is a deficient number, since it is larger than the sum of its proper divisors (17354953).

90132791 is a wasteful number, since it uses less digits than its factorization.

90132791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559861.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 90132791 is about 9493.8291010530. The cubic root of 90132791 is about 448.3607701302.

The spelling of 90132791 in words is "ninety million, one hundred thirty-two thousand, seven hundred ninety-one".