91344131 has 2 divisors, whose sum is σ = 91344132. Its totient is φ = 91344130.

The previous prime is 91344103. The next prime is 91344139. The reversal of 91344131 is 13144319.

It is a strong prime.

It is an emirp because it is prime and its reverse (13144319) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91344131 - 2⁶ = 91344067 is a prime.

It is a super-2 number, since 2×91344131² = 16687500536290322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91344131.

It is not a weakly prime, because it can be changed into another prime (91344139) 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 as a sum of consecutive naturals, namely, 45672065 + 45672066.

It is an arithmetic number, because the mean of its divisors is an integer number (45672066).

Almost surely, 2^91344131 is an apocalyptic number.

91344131 is a deficient number, since it is larger than the sum of its proper divisors (1).

91344131 is an equidigital number, since it uses as much as digits as its factorization.

91344131 is an odious number, because the sum of its binary digits is odd.

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

The square root of 91344131 is about 9557.4123590018. The cubic root of 91344131 is about 450.3604207144.

The spelling of 91344131 in words is "ninety-one million, three hundred forty-four thousand, one hundred thirty-one".