91366431 has 16 divisors (see below), whose sum is σ = 134740704. Its totient is φ = 54705024.

The previous prime is 91366411. The next prime is 91366439. The reversal of 91366431 is 13466319.

It is not a de Polignac number, because 91366431 - 2⁶ = 91366367 is a prime.

It is a super-2 number, since 2×91366431² = 16695649427355522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 91366392 and 91366401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91366439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30216 + ... + 33101.

It is an arithmetic number, because the mean of its divisors is an integer number (8421294).

Almost surely, 2^91366431 is an apocalyptic number.

91366431 is a deficient number, since it is larger than the sum of its proper divisors (43374273).

91366431 is a wasteful number, since it uses less digits than its factorization.

91366431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63370.

The product of its digits is 11664, while the sum is 33.

The square root of 91366431 is about 9558.5789215762. The cubic root of 91366431 is about 450.3970668208.

The spelling of 91366431 in words is "ninety-one million, three hundred sixty-six thousand, four hundred thirty-one".