91937093 has 2 divisors, whose sum is σ = 91937094. Its totient is φ = 91937092.

The previous prime is 91937063. The next prime is 91937113. The reversal of 91937093 is 39073919.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48469444 + 43467649 = 6962^2 + 6593^2 .

It is a cyclic number.

It is not a de Polignac number, because 91937093 - 2⁸ = 91936837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91937093.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91937063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45968546 + 45968547.

It is an arithmetic number, because the mean of its divisors is an integer number (45968547).

Almost surely, 2^91937093 is an apocalyptic number.

It is an amenable number.

91937093 is a deficient number, since it is larger than the sum of its proper divisors (1).

91937093 is an equidigital number, since it uses as much as digits as its factorization.

91937093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45927, while the sum is 41.

The square root of 91937093 is about 9588.3832318071. The cubic root of 91937093 is about 451.3328270856.

The spelling of 91937093 in words is "ninety-one million, nine hundred thirty-seven thousand, ninety-three".