2979479897689 has 9 divisors (see below), whose sum is σ = 3029231601981. Its totient is φ = 2930532397920.

The previous prime is 2979479897663. The next prime is 2979479897707. The reversal of 2979479897689 is 9867989749792.

It is a happy number.

The square root of 2979479897689 is 1726117.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 2310506401225 + 668973496464 = 1520035^2 + 817908^2 .

It is not a de Polignac number, because 2979479897689 - 2⁵ = 2979479897657 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2979479897597 and 2979479897606.

It is not an unprimeable number, because it can be changed into a prime (2979479897629) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 105278989 + ... + 105307285.

It is an arithmetic number, because the mean of its divisors is an integer number (336581289109).

Almost surely, 2^{2979479897689} is an apocalyptic number.

2979479897689 is the 1726117-th square number.

2979479897689 is the 863059-th centered octagonal number.

It is an amenable number.

2979479897689 is a deficient number, since it is larger than the sum of its proper divisors (49751704292).

2979479897689 is an frugal number, since it uses more digits than its factorization.

2979479897689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56716 (or 28358 counting only the distinct ones).

The product of its digits is 62219695104, while the sum is 94.

The spelling of 2979479897689 in words is "two trillion, nine hundred seventy-nine billion, four hundred seventy-nine million, eight hundred ninety-seven thousand, six hundred eighty-nine".