91246889057 has 2 divisors, whose sum is σ = 91246889058. Its totient is φ = 91246889056.

The previous prime is 91246889033. The next prime is 91246889113. The reversal of 91246889057 is 75098864219.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91246889041 + 16 = 302071^2 + 4^2 .

It is a cyclic number.

It is not a de Polignac number, because 91246889057 - 2⁸ = 91246888801 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91246888987 and 91246889005.

It is not a weakly prime, because it can be changed into another prime (91246889857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45623444528 + 45623444529.

It is an arithmetic number, because the mean of its divisors is an integer number (45623444529).

Almost surely, 2^91246889057 is an apocalyptic number.

It is an amenable number.

91246889057 is a deficient number, since it is larger than the sum of its proper divisors (1).

91246889057 is an equidigital number, since it uses as much as digits as its factorization.

91246889057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8709120, while the sum is 59.

The spelling of 91246889057 in words is "ninety-one billion, two hundred forty-six million, eight hundred eighty-nine thousand, fifty-seven".