91245313 has 2 divisors, whose sum is σ = 91245314. Its totient is φ = 91245312.

The previous prime is 91245311. The next prime is 91245337. The reversal of 91245313 is 31354219.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77651344 + 13593969 = 8812^2 + 3687^2 .

It is a cyclic number.

It is not a de Polignac number, because 91245313 - 2¹ = 91245311 is a prime.

Together with 91245311, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (91245311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45622656 + 45622657.

It is an arithmetic number, because the mean of its divisors is an integer number (45622657).

Almost surely, 2^91245313 is an apocalyptic number.

It is an amenable number.

91245313 is a deficient number, since it is larger than the sum of its proper divisors (1).

91245313 is an equidigital number, since it uses as much as digits as its factorization.

91245313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 28.

The square root of 91245313 is about 9552.2412553285. The cubic root of 91245313 is about 450.1979589938.

It can be divided in two parts, 912 and 45313, that added together give a square (46225 = 215²).

The spelling of 91245313 in words is "ninety-one million, two hundred forty-five thousand, three hundred thirteen".