697665 has 8 divisors (see below), whose sum is σ = 1116288. Its totient is φ = 372080.

The previous prime is 697643. The next prime is 697673. The reversal of 697665 is 566796.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 697665 - 2⁶ = 697601 is a prime.

It is an Ulam number.

It is a nialpdrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 697665.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23241 + ... + 23270.

It is an arithmetic number, because the mean of its divisors is an integer number (139536).

2⁶⁹⁷⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

697665 is a deficient number, since it is larger than the sum of its proper divisors (418623).

697665 is a wasteful number, since it uses less digits than its factorization.

697665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46519.

The product of its digits is 68040, while the sum is 39.

The square root of 697665 is about 835.2634314993. The cubic root of 697665 is about 88.6915637272.

The spelling of 697665 in words is "six hundred ninety-seven thousand, six hundred sixty-five".