659697723 has 12 divisors (see below), whose sum is σ = 977527720. Its totient is φ = 439709508.

The previous prime is 659697719. The next prime is 659697769. The reversal of 659697723 is 327796956.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 659697723 - 2² = 659697719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 659697723.

It is not an unprimeable number, because it can be changed into a prime (659697923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 130990 + ... + 135932.

Almost surely, 2^659697723 is an apocalyptic number.

659697723 is a deficient number, since it is larger than the sum of its proper divisors (317829997).

659697723 is an frugal number, since it uses more digits than its factorization.

659697723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9895 (or 4946 counting only the distinct ones).

The product of its digits is 4286520, while the sum is 54.

The square root of 659697723 is about 25684.5814254389. The cubic root of 659697723 is about 870.5258295672.

The spelling of 659697723 in words is "six hundred fifty-nine million, six hundred ninety-seven thousand, seven hundred twenty-three".