679684237 has 2 divisors, whose sum is σ = 679684238. Its totient is φ = 679684236.

The previous prime is 679684231. The next prime is 679684241. The reversal of 679684237 is 732486976.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 659154276 + 20529961 = 25674^2 + 4531^2 .

It is a cyclic number.

It is not a de Polignac number, because 679684237 - 2²³ = 671295629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (679684231) 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, 339842118 + 339842119.

It is an arithmetic number, because the mean of its divisors is an integer number (339842119).

Almost surely, 2^679684237 is an apocalyptic number.

It is an amenable number.

679684237 is a deficient number, since it is larger than the sum of its proper divisors (1).

679684237 is an equidigital number, since it uses as much as digits as its factorization.

679684237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3048192, while the sum is 52.

The square root of 679684237 is about 26070.7544386425. The cubic root of 679684237 is about 879.2298000119.

The spelling of 679684237 in words is "six hundred seventy-nine million, six hundred eighty-four thousand, two hundred thirty-seven".