1679057257 has 2 divisors, whose sum is σ = 1679057258. Its totient is φ = 1679057256.

The previous prime is 1679057251. The next prime is 1679057267. The reversal of 1679057257 is 7527509761.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1147109161 + 531948096 = 33869^2 + 23064^2 .

It is a cyclic number.

It is not a de Polignac number, because 1679057257 - 2⁷ = 1679057129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1679057257.

It is not a weakly prime, because it can be changed into another prime (1679057251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 839528628 + 839528629.

It is an arithmetic number, because the mean of its divisors is an integer number (839528629).

Almost surely, 2^1679057257 is an apocalyptic number.

It is an amenable number.

1679057257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1679057257 is an equidigital number, since it uses as much as digits as its factorization.

1679057257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 926100, while the sum is 49.

The square root of 1679057257 is about 40976.3011629893. The cubic root of 1679057257 is about 1188.5619842310.

It can be divided in two parts, 16790 and 57257, that added together give a palindrome (74047).

The spelling of 1679057257 in words is "one billion, six hundred seventy-nine million, fifty-seven thousand, two hundred fifty-seven".