679550647 has 2 divisors, whose sum is σ = 679550648. Its totient is φ = 679550646.

The previous prime is 679550593. The next prime is 679550671. The reversal of 679550647 is 746055976.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-679550647 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 679550647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (679550147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339775323 + 339775324.

It is an arithmetic number, because the mean of its divisors is an integer number (339775324).

Almost surely, 2^679550647 is an apocalyptic number.

679550647 is a deficient number, since it is larger than the sum of its proper divisors (1).

679550647 is an equidigital number, since it uses as much as digits as its factorization.

679550647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1587600, while the sum is 49.

The square root of 679550647 is about 26068.1922464907. The cubic root of 679550647 is about 879.1721928670.

The spelling of 679550647 in words is "six hundred seventy-nine million, five hundred fifty thousand, six hundred forty-seven".