91153253 has 2 divisors, whose sum is σ = 91153254. Its totient is φ = 91153252.

The previous prime is 91153243. The next prime is 91153261. The reversal of 91153253 is 35235119.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64754209 + 26399044 = 8047^2 + 5138^2 .

It is an emirp because it is prime and its reverse (35235119) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91153253 - 2²⁶ = 24044389 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91153243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45576626 + 45576627.

It is an arithmetic number, because the mean of its divisors is an integer number (45576627).

Almost surely, 2^91153253 is an apocalyptic number.

It is an amenable number.

91153253 is a deficient number, since it is larger than the sum of its proper divisors (1).

91153253 is an equidigital number, since it uses as much as digits as its factorization.

91153253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4050, while the sum is 29.

The square root of 91153253 is about 9547.4212748784. The cubic root of 91153253 is about 450.0465021903.

The spelling of 91153253 in words is "ninety-one million, one hundred fifty-three thousand, two hundred fifty-three".