90132691 has 16 divisors (see below), whose sum is σ = 105204960. Its totient is φ = 76308480.

The previous prime is 90132689. The next prime is 90132697. The reversal of 90132691 is 19623109.

It is a cyclic number.

It is not a de Polignac number, because 90132691 - 2¹ = 90132689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90132697) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15655 + ... + 20623.

It is an arithmetic number, because the mean of its divisors is an integer number (6575310).

Almost surely, 2^90132691 is an apocalyptic number.

90132691 is a deficient number, since it is larger than the sum of its proper divisors (15072269).

90132691 is a wasteful number, since it uses less digits than its factorization.

90132691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5094.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 90132691 is about 9493.8238344726. The cubic root of 90132691 is about 448.3606043152.

The spelling of 90132691 in words is "ninety million, one hundred thirty-two thousand, six hundred ninety-one".