1253790397 has 2 divisors, whose sum is σ = 1253790398. Its totient is φ = 1253790396.

The previous prime is 1253790371. The next prime is 1253790451. The reversal of 1253790397 is 7930973521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 933058116 + 320732281 = 30546^2 + 17909^2 .

It is a cyclic number.

It is not a de Polignac number, because 1253790397 - 2¹⁵ = 1253757629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1253790337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626895198 + 626895199.

It is an arithmetic number, because the mean of its divisors is an integer number (626895199).

Almost surely, 2^1253790397 is an apocalyptic number.

It is an amenable number.

1253790397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1253790397 is an equidigital number, since it uses as much as digits as its factorization.

1253790397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 357210, while the sum is 46.

The square root of 1253790397 is about 35408.9027929418. The cubic root of 1253790397 is about 1078.3050680199.

The spelling of 1253790397 in words is "one billion, two hundred fifty-three million, seven hundred ninety thousand, three hundred ninety-seven".