1249749737 has 2 divisors, whose sum is σ = 1249749738. Its totient is φ = 1249749736.

The previous prime is 1249749731. The next prime is 1249749763. The reversal of 1249749737 is 7379479421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1022976256 + 226773481 = 31984^2 + 15059^2 .

It is a cyclic number.

It is not a de Polignac number, because 1249749737 - 2²⁰ = 1248701161 is a prime.

It is not a weakly prime, because it can be changed into another prime (1249749731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624874868 + 624874869.

It is an arithmetic number, because the mean of its divisors is an integer number (624874869).

Almost surely, 2^1249749737 is an apocalyptic number.

It is an amenable number.

1249749737 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249749737 is an equidigital number, since it uses as much as digits as its factorization.

1249749737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2667168, while the sum is 53.

The square root of 1249749737 is about 35351.7996288732. The cubic root of 1249749737 is about 1077.1454501792.

The spelling of 1249749737 in words is "one billion, two hundred forty-nine million, seven hundred forty-nine thousand, seven hundred thirty-seven".