91900253 has 2 divisors, whose sum is σ = 91900254. Its totient is φ = 91900252.

The previous prime is 91900241. The next prime is 91900273. The reversal of 91900253 is 35200919.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80964004 + 10936249 = 8998^2 + 3307^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91900253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91900273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45950126 + 45950127.

It is an arithmetic number, because the mean of its divisors is an integer number (45950127).

Almost surely, 2^91900253 is an apocalyptic number.

It is an amenable number.

91900253 is a deficient number, since it is larger than the sum of its proper divisors (1).

91900253 is an equidigital number, since it uses as much as digits as its factorization.

91900253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 91900253 is about 9586.4619646666. The cubic root of 91900253 is about 451.2725346900.

The spelling of 91900253 in words is "ninety-one million, nine hundred thousand, two hundred fifty-three".