1339978851 has 12 divisors (see below), whose sum is σ = 1982733480. Its totient is φ = 871530720.

The previous prime is 1339978837. The next prime is 1339978877. The reversal of 1339978851 is 1588799331.

It is not a de Polignac number, because 1339978851 - 2⁷ = 1339978723 is a prime.

It is a super-2 number, since 2×1339978851² = 3591086642254560402, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1339978151) 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 in 11 ways as a sum of consecutive naturals, for example, 1815321 + ... + 1816058.

It is an arithmetic number, because the mean of its divisors is an integer number (165227790).

Almost surely, 2^1339978851 is an apocalyptic number.

1339978851 is a deficient number, since it is larger than the sum of its proper divisors (642754629).

1339978851 is a wasteful number, since it uses less digits than its factorization.

1339978851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3631426 (or 3631423 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 54.

The square root of 1339978851 is about 36605.7215609801. The cubic root of 1339978851 is about 1102.4679713650.

The spelling of 1339978851 in words is "one billion, three hundred thirty-nine million, nine hundred seventy-eight thousand, eight hundred fifty-one".