91431314 has 16 divisors (see below), whose sum is σ = 150120600. Its totient is φ = 41506560.

The previous prime is 91431313. The next prime is 91431323. The reversal of 91431314 is 41313419.

It can be written as a sum of positive squares in 4 ways, for example, as 68343289 + 23088025 = 8267^2 + 4805^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (91431313) 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, 27239 + ... + 30410.

Almost surely, 2^91431314 is an apocalyptic number.

91431314 is a deficient number, since it is larger than the sum of its proper divisors (58689286).

91431314 is a wasteful number, since it uses less digits than its factorization.

91431314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57725.

The product of its digits is 1296, while the sum is 26.

The square root of 91431314 is about 9561.9722860924. The cubic root of 91431314 is about 450.5036566547.

The spelling of 91431314 in words is "ninety-one million, four hundred thirty-one thousand, three hundred fourteen".