91124631 has 36 divisors (see below), whose sum is σ = 143748696. Its totient is φ = 55598400.

The previous prime is 91124617. The next prime is 91124633. The reversal of 91124631 is 13642119.

91124631 is a `hidden beast` number, since 9 + 1 + 1 + 24 + 631 = 666.

It is not a de Polignac number, because 91124631 - 2⁶ = 91124567 is a prime.

It is a super-2 number, since 2×91124631² = 16607396749772322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 91124595 and 91124604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91124633) 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 35 ways as a sum of consecutive naturals, for example, 275136 + ... + 275466.

Almost surely, 2^91124631 is an apocalyptic number.

91124631 is a deficient number, since it is larger than the sum of its proper divisors (52624065).

91124631 is a wasteful number, since it uses less digits than its factorization.

91124631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544 (or 528 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 91124631 is about 9545.9222184135. The cubic root of 91124631 is about 449.9993925918. Note that the first 3 decimals are identical.

The spelling of 91124631 in words is "ninety-one million, one hundred twenty-four thousand, six hundred thirty-one".