697609 has 4 divisors (see below), whose sum is σ = 761040. Its totient is φ = 634180.

The previous prime is 697603. The next prime is 697637. The reversal of 697609 is 906796.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 697609 - 2³ = 697601 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (697601) 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, 31699 + ... + 31720.

It is an arithmetic number, because the mean of its divisors is an integer number (190260).

2⁶⁹⁷⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

697609 is a deficient number, since it is larger than the sum of its proper divisors (63431).

697609 is a wasteful number, since it uses less digits than its factorization.

697609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63430.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 697609 is about 835.2299084683. The cubic root of 697609 is about 88.6891906396.

The spelling of 697609 in words is "six hundred ninety-seven thousand, six hundred nine".