679571947 has 2 divisors, whose sum is σ = 679571948. Its totient is φ = 679571946.

The previous prime is 679571929. The next prime is 679571951. The reversal of 679571947 is 749175976.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 679571947 - 2¹¹ = 679569899 is a prime.

It is a super-2 number, since 2×679571947² = 923636062298741618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (679572947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339785973 + 339785974.

It is an arithmetic number, because the mean of its divisors is an integer number (339785974).

Almost surely, 2^679571947 is an apocalyptic number.

679571947 is a deficient number, since it is larger than the sum of its proper divisors (1).

679571947 is an equidigital number, since it uses as much as digits as its factorization.

679571947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3333960, while the sum is 55.

The square root of 679571947 is about 26068.6007871539. The cubic root of 679571947 is about 879.1813784330.

The spelling of 679571947 in words is "six hundred seventy-nine million, five hundred seventy-one thousand, nine hundred forty-seven".