91900273 has 2 divisors, whose sum is σ = 91900274. Its totient is φ = 91900272.

The previous prime is 91900253. The next prime is 91900279. The reversal of 91900273 is 37200919.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78269409 + 13630864 = 8847^2 + 3692^2 .

It is a cyclic number.

It is not a de Polignac number, because 91900273 - 2⁵ = 91900241 is a prime.

It is not a weakly prime, because it can be changed into another prime (91900279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45950136 + 45950137.

It is an arithmetic number, because the mean of its divisors is an integer number (45950137).

Almost surely, 2^91900273 is an apocalyptic number.

It is an amenable number.

91900273 is a deficient number, since it is larger than the sum of its proper divisors (1).

91900273 is an equidigital number, since it uses as much as digits as its factorization.

91900273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 91900273 is about 9586.4630078043. The cubic root of 91900273 is about 451.2725674264.

The spelling of 91900273 in words is "ninety-one million, nine hundred thousand, two hundred seventy-three".