91568453 has 2 divisors, whose sum is σ = 91568454. Its totient is φ = 91568452.

The previous prime is 91568437. The next prime is 91568459. The reversal of 91568453 is 35486519.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85507009 + 6061444 = 9247^2 + 2462^2 .

It is an emirp because it is prime and its reverse (35486519) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91568453 - 2⁴ = 91568437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91568453.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91568459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45784226 + 45784227.

It is an arithmetic number, because the mean of its divisors is an integer number (45784227).

Almost surely, 2^91568453 is an apocalyptic number.

It is an amenable number.

91568453 is a deficient number, since it is larger than the sum of its proper divisors (1).

91568453 is an equidigital number, since it uses as much as digits as its factorization.

91568453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 41.

The square root of 91568453 is about 9569.1406615223. The cubic root of 91568453 is about 450.7287828722.

The spelling of 91568453 in words is "ninety-one million, five hundred sixty-eight thousand, four hundred fifty-three".