91937113 has 2 divisors, whose sum is σ = 91937114. Its totient is φ = 91937112.

The previous prime is 91937093. The next prime is 91937117. The reversal of 91937113 is 31173919.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54641664 + 37295449 = 7392^2 + 6107^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91937113 is a prime.

It is not a weakly prime, because it can be changed into another prime (91937117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45968556 + 45968557.

It is an arithmetic number, because the mean of its divisors is an integer number (45968557).

Almost surely, 2^91937113 is an apocalyptic number.

It is an amenable number.

91937113 is a deficient number, since it is larger than the sum of its proper divisors (1).

91937113 is an equidigital number, since it uses as much as digits as its factorization.

91937113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5103, while the sum is 34.

The square root of 91937113 is about 9588.3842747358. The cubic root of 91937113 is about 451.3328598132.

The spelling of 91937113 in words is "ninety-one million, nine hundred thirty-seven thousand, one hundred thirteen".