1250890997 has 2 divisors, whose sum is σ = 1250890998. Its totient is φ = 1250890996.

The previous prime is 1250890981. The next prime is 1250890999. The reversal of 1250890997 is 7990980521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1189284196 + 61606801 = 34486^2 + 7849^2 .

It is a cyclic number.

It is not a de Polignac number, because 1250890997 - 2⁴ = 1250890981 is a prime.

Together with 1250890999, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1250890999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625445498 + 625445499.

It is an arithmetic number, because the mean of its divisors is an integer number (625445499).

Almost surely, 2^1250890997 is an apocalyptic number.

It is an amenable number.

1250890997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1250890997 is an equidigital number, since it uses as much as digits as its factorization.

1250890997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240, while the sum is 50.

The square root of 1250890997 is about 35367.9374151222. The cubic root of 1250890997 is about 1077.4732302069.

The spelling of 1250890997 in words is "one billion, two hundred fifty million, eight hundred ninety thousand, nine hundred ninety-seven".