1253249969 has 2 divisors, whose sum is σ = 1253249970. Its totient is φ = 1253249968.

The previous prime is 1253249947. The next prime is 1253249981. The reversal of 1253249969 is 9699423521.

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., 821109025 + 432140944 = 28655^2 + 20788^2 .

It is a cyclic number.

It is not a de Polignac number, because 1253249969 - 2¹⁶ = 1253184433 is a prime.

It is a super-2 number, since 2×1253249969² = 3141270969597001922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1253249929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626624984 + 626624985.

It is an arithmetic number, because the mean of its divisors is an integer number (626624985).

Almost surely, 2^1253249969 is an apocalyptic number.

It is an amenable number.

1253249969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1253249969 is an equidigital number, since it uses as much as digits as its factorization.

1253249969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1049760, while the sum is 50.

The square root of 1253249969 is about 35401.2707257805. The cubic root of 1253249969 is about 1078.1501165488.

The spelling of 1253249969 in words is "one billion, two hundred fifty-three million, two hundred forty-nine thousand, nine hundred sixty-nine".