1249676819 has 2 divisors, whose sum is σ = 1249676820. Its totient is φ = 1249676818.

The previous prime is 1249676741. The next prime is 1249676881. The reversal of 1249676819 is 9186769421.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1249676819 is a prime.

It is a super-2 number, since 2×1249676819² = 3123384303891917522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1249678819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624838409 + 624838410.

It is an arithmetic number, because the mean of its divisors is an integer number (624838410).

Almost surely, 2^1249676819 is an apocalyptic number.

1249676819 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249676819 is an equidigital number, since it uses as much as digits as its factorization.

1249676819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 53.

The square root of 1249676819 is about 35350.7682943384. The cubic root of 1249676819 is about 1077.1245006997.

The spelling of 1249676819 in words is "one billion, two hundred forty-nine million, six hundred seventy-six thousand, eight hundred nineteen".