250797190921 has 2 divisors, whose sum is σ = 250797190922. Its totient is φ = 250797190920.

The previous prime is 250797190901. The next prime is 250797190981. The reversal of 250797190921 is 129091797052.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156191734521 + 94605456400 = 395211^2 + 307580^2 .

It is a cyclic number.

It is not a de Polignac number, because 250797190921 - 2³³ = 242207256329 is a prime.

It is not a weakly prime, because it can be changed into another prime (250797190901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125398595460 + 125398595461.

It is an arithmetic number, because the mean of its divisors is an integer number (125398595461).

Almost surely, 2^250797190921 is an apocalyptic number.

It is an amenable number.

250797190921 is a deficient number, since it is larger than the sum of its proper divisors (1).

250797190921 is an equidigital number, since it uses as much as digits as its factorization.

250797190921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 714420, while the sum is 52.

The spelling of 250797190921 in words is "two hundred fifty billion, seven hundred ninety-seven million, one hundred ninety thousand, nine hundred twenty-one".