679076989 has 2 divisors, whose sum is σ = 679076990. Its totient is φ = 679076988.

The previous prime is 679076971. The next prime is 679077013. The reversal of 679076989 is 989670976.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 497959225 + 181117764 = 22315^2 + 13458^2 .

It is a cyclic number.

It is not a de Polignac number, because 679076989 - 2⁹ = 679076477 is a prime.

It is a super-2 number, since 2×679076989² = 922291113978612242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (679076389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339538494 + 339538495.

It is an arithmetic number, because the mean of its divisors is an integer number (339538495).

Almost surely, 2^679076989 is an apocalyptic number.

It is an amenable number.

679076989 is a deficient number, since it is larger than the sum of its proper divisors (1).

679076989 is an equidigital number, since it uses as much as digits as its factorization.

679076989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10287648, while the sum is 61.

The square root of 679076989 is about 26059.1056830429. The cubic root of 679076989 is about 878.9678795540.

The spelling of 679076989 in words is "six hundred seventy-nine million, seventy-six thousand, nine hundred eighty-nine".