1979376847 has 16 divisors (see below), whose sum is σ = 2317685760. Its totient is φ = 1655185248.

The previous prime is 1979376811. The next prime is 1979376869. The reversal of 1979376847 is 7486739791.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1979376847 is a prime.

It is a super-2 number, since 2×1979376847² = 7835865404879322818, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1979376947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94804 + ... + 113782.

It is an arithmetic number, because the mean of its divisors is an integer number (144855360).

Almost surely, 2^1979376847 is an apocalyptic number.

1979376847 is a deficient number, since it is larger than the sum of its proper divisors (338308913).

1979376847 is a wasteful number, since it uses less digits than its factorization.

1979376847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19350.

The product of its digits is 16003008, while the sum is 61.

The square root of 1979376847 is about 44490.1882104358. The cubic root of 1979376847 is about 1255.5754881968.

The spelling of 1979376847 in words is "one billion, nine hundred seventy-nine million, three hundred seventy-six thousand, eight hundred forty-seven".