1012856939 has 2 divisors, whose sum is σ = 1012856940. Its totient is φ = 1012856938.

The previous prime is 1012856927. The next prime is 1012856941. The reversal of 1012856939 is 9396582101.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1012856939 - 2⁸ = 1012856683 is a prime.

Together with 1012856941, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1012856939.

It is not a weakly prime, because it can be changed into another prime (1012856539) 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, 506428469 + 506428470.

It is an arithmetic number, because the mean of its divisors is an integer number (506428470).

Almost surely, 2^1012856939 is an apocalyptic number.

1012856939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012856939 is an equidigital number, since it uses as much as digits as its factorization.

1012856939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 1012856939 is about 31825.4134144397. The cubic root of 1012856939 is about 1004.2674096440.

The spelling of 1012856939 in words is "one billion, twelve million, eight hundred fifty-six thousand, nine hundred thirty-nine".