90961191 has 16 divisors (see below), whose sum is σ = 135103200. Its totient is φ = 60485184.

The previous prime is 90961163. The next prime is 90961193. The reversal of 90961191 is 19116909.

It is not a de Polignac number, because 90961191 - 2¹⁵ = 90928423 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90961193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6925 + ... + 15161.

It is an arithmetic number, because the mean of its divisors is an integer number (8443950).

Almost surely, 2^90961191 is an apocalyptic number.

90961191 is a deficient number, since it is larger than the sum of its proper divisors (44142009).

90961191 is a wasteful number, since it uses less digits than its factorization.

90961191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8655 (or 8649 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 36.

The square root of 90961191 is about 9537.3576529351. The cubic root of 90961191 is about 449.7301938204.

The spelling of 90961191 in words is "ninety million, nine hundred sixty-one thousand, one hundred ninety-one".