1249500979 has 2 divisors, whose sum is σ = 1249500980. Its totient is φ = 1249500978.

The previous prime is 1249500961. The next prime is 1249500983. The reversal of 1249500979 is 9790059421.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1249500979 - 2⁵ = 1249500947 is a prime.

It is a super-2 number, since 2×1249500979² = 3122505393043916882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1249500919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624750489 + 624750490.

It is an arithmetic number, because the mean of its divisors is an integer number (624750490).

Almost surely, 2^1249500979 is an apocalyptic number.

1249500979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249500979 is an equidigital number, since it uses as much as digits as its factorization.

1249500979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 204120, while the sum is 46.

The square root of 1249500979 is about 35348.2811321852. The cubic root of 1249500979 is about 1077.0739781823.

The spelling of 1249500979 in words is "one billion, two hundred forty-nine million, five hundred thousand, nine hundred seventy-nine".