697679 has 4 divisors (see below), whose sum is σ = 699360. Its totient is φ = 696000.

The previous prime is 697673. The next prime is 697681. The reversal of 697679 is 976796.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 697679 - 2⁸ = 697423 is a prime.

It is a super-3 number, since 3×697679³ = 1018798290848333517, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 697679.

It is not an unprimeable number, because it can be changed into a prime (697673) 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 in 3 ways as a sum of consecutive naturals, for example, 287 + ... + 1215.

It is an arithmetic number, because the mean of its divisors is an integer number (174840).

2⁶⁹⁷⁶⁷⁹ is an apocalyptic number.

697679 is a deficient number, since it is larger than the sum of its proper divisors (1681).

697679 is an equidigital number, since it uses as much as digits as its factorization.

697679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680.

The product of its digits is 142884, while the sum is 44.

The square root of 697679 is about 835.2718120468. The cubic root of 697679 is about 88.6921569792.

The spelling of 697679 in words is "six hundred ninety-seven thousand, six hundred seventy-nine".