679796081 has 2 divisors, whose sum is σ = 679796082. Its totient is φ = 679796080.

The previous prime is 679796077. The next prime is 679796149. The reversal of 679796081 is 180697976.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 662290225 + 17505856 = 25735^2 + 4184^2 .

It is a cyclic number.

It is not a de Polignac number, because 679796081 - 2² = 679796077 is a prime.

It is a super-2 number, since 2×679796081² = 924245423485917122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (679796011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339898040 + 339898041.

It is an arithmetic number, because the mean of its divisors is an integer number (339898041).

Almost surely, 2^679796081 is an apocalyptic number.

It is an amenable number.

679796081 is a deficient number, since it is larger than the sum of its proper divisors (1).

679796081 is an equidigital number, since it uses as much as digits as its factorization.

679796081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The square root of 679796081 is about 26072.8993592964. The cubic root of 679796081 is about 879.2780239661.

The spelling of 679796081 in words is "six hundred seventy-nine million, seven hundred ninety-six thousand, eighty-one".