679057 has 4 divisors (see below), whose sum is σ = 680740. Its totient is φ = 677376.

The previous prime is 679051. The next prime is 679067. The reversal of 679057 is 750976.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 215296 + 463761 = 464^2 + 681^2 .

It is a 3-Lehmer number, since φ(679057) divides (679057-1)³.

It is a cyclic number.

It is not a de Polignac number, because 679057 - 2¹⁹ = 154769 is a prime.

It is a super-2 number, since 2×679057² = 922236818498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169 + ... + 1177.

It is an arithmetic number, because the mean of its divisors is an integer number (170185).

2⁶⁷⁹⁰⁵⁷ is an apocalyptic number.

679057 is the 673-rd pentagonal number.

It is an amenable number.

679057 is a deficient number, since it is larger than the sum of its proper divisors (1683).

679057 is a wasteful number, since it uses less digits than its factorization.

679057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1682.

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 679057 is about 824.0491490196. The cubic root of 679057 is about 87.8959255170.

The spelling of 679057 in words is "six hundred seventy-nine thousand, fifty-seven".