1249933897 has 2 divisors, whose sum is σ = 1249933898. Its totient is φ = 1249933896.

The previous prime is 1249933877. The next prime is 1249933907. The reversal of 1249933897 is 7983399421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1056835081 + 193098816 = 32509^2 + 13896^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1249933897 is a prime.

It is not a weakly prime, because it can be changed into another prime (1249933807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624966948 + 624966949.

It is an arithmetic number, because the mean of its divisors is an integer number (624966949).

Almost surely, 2^1249933897 is an apocalyptic number.

It is an amenable number.

1249933897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249933897 is an equidigital number, since it uses as much as digits as its factorization.

1249933897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2939328, while the sum is 55.

The square root of 1249933897 is about 35354.4042093768. The cubic root of 1249933897 is about 1077.1983560684.

The spelling of 1249933897 in words is "one billion, two hundred forty-nine million, nine hundred thirty-three thousand, eight hundred ninety-seven".