697279 has 4 divisors (see below), whose sum is σ = 760680. Its totient is φ = 633880.

The previous prime is 697271. The next prime is 697303. The reversal of 697279 is 972796.

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

It is a cyclic number.

It is not a de Polignac number, because 697279 - 2³ = 697271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (697271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31684 + ... + 31705.

It is an arithmetic number, because the mean of its divisors is an integer number (190170).

2⁶⁹⁷²⁷⁹ is an apocalyptic number.

697279 is a deficient number, since it is larger than the sum of its proper divisors (63401).

697279 is a wasteful number, since it uses less digits than its factorization.

697279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63400.

The product of its digits is 47628, while the sum is 40.

The square root of 697279 is about 835.0323347033. The cubic root of 697279 is about 88.6752037935.

The spelling of 697279 in words is "six hundred ninety-seven thousand, two hundred seventy-nine".