90961091 has 8 divisors (see below), whose sum is σ = 99807120. Its totient is φ = 82379232.

The previous prime is 90961069. The next prime is 90961147. The reversal of 90961091 is 19016909.

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

It is not a de Polignac number, because 90961091 - 2¹⁸ = 90698947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90961391) 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, 65321 + ... + 66698.

It is an arithmetic number, because the mean of its divisors is an integer number (12475890).

Almost surely, 2^90961091 is an apocalyptic number.

90961091 is a deficient number, since it is larger than the sum of its proper divisors (8846029).

90961091 is a wasteful number, since it uses less digits than its factorization.

90961091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132085.

The product of its (nonzero) digits is 4374, while the sum is 35.

The square root of 90961091 is about 9537.3524103915. The cubic root of 90961091 is about 449.7300290137.

The spelling of 90961091 in words is "ninety million, nine hundred sixty-one thousand, ninety-one".