1979512831 has 8 divisors (see below), whose sum is σ = 1988511120. Its totient is φ = 1970535168.

The previous prime is 1979512819. The next prime is 1979512859. The reversal of 1979512831 is 1382159791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1979512831 - 2¹¹ = 1979510783 is a prime.

It is a super-2 number, since 2×1979512831² = 7836942096187269122, 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 (1979512331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206415 + ... + 215791.

It is an arithmetic number, because the mean of its divisors is an integer number (248563890).

Almost surely, 2^1979512831 is an apocalyptic number.

1979512831 is a deficient number, since it is larger than the sum of its proper divisors (8998289).

1979512831 is an equidigital number, since it uses as much as digits as its factorization.

1979512831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10313.

The product of its digits is 136080, while the sum is 46.

The square root of 1979512831 is about 44491.7164312639. The cubic root of 1979512831 is about 1255.6042403885.

The spelling of 1979512831 in words is "one billion, nine hundred seventy-nine million, five hundred twelve thousand, eight hundred thirty-one".