3126799969 has 2 divisors, whose sum is σ = 3126799970. Its totient is φ = 3126799968.

The previous prime is 3126799967. The next prime is 3126800023. The reversal of 3126799969 is 9699976213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2379488400 + 747311569 = 48780^2 + 27337^2 .

It is an emirp because it is prime and its reverse (9699976213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3126799969 - 2¹ = 3126799967 is a prime.

It is a super-2 number, since 2×3126799969² = 19553756092276801922, which contains 22 as substring.

Together with 3126799967, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3126799967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1563399984 + 1563399985.

It is an arithmetic number, because the mean of its divisors is an integer number (1563399985).

Almost surely, 2^3126799969 is an apocalyptic number.

It is an amenable number.

3126799969 is a deficient number, since it is larger than the sum of its proper divisors (1).

3126799969 is an equidigital number, since it uses as much as digits as its factorization.

3126799969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9920232, while the sum is 61.

The square root of 3126799969 is about 55917.7965320523. The cubic root of 3126799969 is about 1462.2895160985.

The spelling of 3126799969 in words is "three billion, one hundred twenty-six million, seven hundred ninety-nine thousand, nine hundred sixty-nine".