91469231 has 12 divisors (see below), whose sum is σ = 112663008. Its totient is φ = 73789632.

The previous prime is 91469227. The next prime is 91469239. The reversal of 91469231 is 13296419.

It is not a de Polignac number, because 91469231 - 2² = 91469227 is a prime.

It is a super-2 number, since 2×91469231² = 16733240439462722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91469191 and 91469200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91469239) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54071 + ... + 55736.

It is an arithmetic number, because the mean of its divisors is an integer number (9388584).

Almost surely, 2^91469231 is an apocalyptic number.

91469231 is a deficient number, since it is larger than the sum of its proper divisors (21193777).

91469231 is a wasteful number, since it uses less digits than its factorization.

91469231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109838 (or 109831 counting only the distinct ones).

The product of its digits is 11664, while the sum is 35.

The square root of 91469231 is about 9563.9547782285. The cubic root of 91469231 is about 450.5659233831.

The spelling of 91469231 in words is "ninety-one million, four hundred sixty-nine thousand, two hundred thirty-one".