91245653 has 2 divisors, whose sum is σ = 91245654. Its totient is φ = 91245652.

The previous prime is 91245631. The next prime is 91245667. The reversal of 91245653 is 35654219.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87647044 + 3598609 = 9362^2 + 1897^2 .

It is a cyclic number.

It is not a de Polignac number, because 91245653 - 2¹⁸ = 90983509 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91245053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45622826 + 45622827.

It is an arithmetic number, because the mean of its divisors is an integer number (45622827).

Almost surely, 2^91245653 is an apocalyptic number.

It is an amenable number.

91245653 is a deficient number, since it is larger than the sum of its proper divisors (1).

91245653 is an equidigital number, since it uses as much as digits as its factorization.

91245653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 35.

The square root of 91245653 is about 9552.2590521824. The cubic root of 91245653 is about 450.1985181719.

The spelling of 91245653 in words is "ninety-one million, two hundred forty-five thousand, six hundred fifty-three".