91369131 has 8 divisors (see below), whose sum is σ = 139229184. Its totient is φ = 52210920.

The previous prime is 91369129. The next prime is 91369147. The reversal of 91369131 is 13196319.

It is a happy number.

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

It is not a de Polignac number, because 91369131 - 2¹ = 91369129 is a prime.

It is a super-2 number, since 2×91369131² = 16696636199390322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 91369092 and 91369101.

It is not an unprimeable number, because it can be changed into a prime (91369181) 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, 2175435 + ... + 2175476.

It is an arithmetic number, because the mean of its divisors is an integer number (17403648).

Almost surely, 2^91369131 is an apocalyptic number.

91369131 is a deficient number, since it is larger than the sum of its proper divisors (47860053).

91369131 is a wasteful number, since it uses less digits than its factorization.

91369131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4350921.

The product of its digits is 4374, while the sum is 33.

The square root of 91369131 is about 9558.7201549161. The cubic root of 91369131 is about 450.4015033886.

The spelling of 91369131 in words is "ninety-one million, three hundred sixty-nine thousand, one hundred thirty-one".