679940377 has 2 divisors, whose sum is σ = 679940378. Its totient is φ = 679940376.

The previous prime is 679940369. The next prime is 679940411. The reversal of 679940377 is 773049976.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 565535961 + 114404416 = 23781^2 + 10696^2 .

It is a cyclic number.

It is not a de Polignac number, because 679940377 - 2³ = 679940369 is a prime.

It is not a weakly prime, because it can be changed into another prime (679940357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339970188 + 339970189.

It is an arithmetic number, because the mean of its divisors is an integer number (339970189).

Almost surely, 2^679940377 is an apocalyptic number.

It is an amenable number.

679940377 is a deficient number, since it is larger than the sum of its proper divisors (1).

679940377 is an equidigital number, since it uses as much as digits as its factorization.

679940377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2000376, while the sum is 52.

The square root of 679940377 is about 26075.6663769116. Note that the first 3 decimals coincide. The cubic root of 679940377 is about 879.3402324868.

The spelling of 679940377 in words is "six hundred seventy-nine million, nine hundred forty thousand, three hundred seventy-seven".