91345625237 has 2 divisors, whose sum is σ = 91345625238. Its totient is φ = 91345625236.

The previous prime is 91345625221. The next prime is 91345625243. The reversal of 91345625237 is 73252654319.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82097148676 + 9248476561 = 286526^2 + 96169^2 .

It is a cyclic number.

It is not a de Polignac number, because 91345625237 - 2⁴ = 91345625221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91345625191 and 91345625200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91345625257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45672812618 + 45672812619.

It is an arithmetic number, because the mean of its divisors is an integer number (45672812619).

Almost surely, 2^91345625237 is an apocalyptic number.

It is an amenable number.

91345625237 is a deficient number, since it is larger than the sum of its proper divisors (1).

91345625237 is an equidigital number, since it uses as much as digits as its factorization.

91345625237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1360800, while the sum is 47.

The spelling of 91345625237 in words is "ninety-one billion, three hundred forty-five million, six hundred twenty-five thousand, two hundred thirty-seven".