397659689 has 16 divisors (see below), whose sum is σ = 469418112. Its totient is φ = 329816448.

The previous prime is 397659677. The next prime is 397659737. The reversal of 397659689 is 986956793.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397659689 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (397659649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19742 + ... + 34424.

It is an arithmetic number, because the mean of its divisors is an integer number (29338632).

Almost surely, 2^397659689 is an apocalyptic number.

It is an amenable number.

397659689 is a deficient number, since it is larger than the sum of its proper divisors (71758423).

397659689 is a wasteful number, since it uses less digits than its factorization.

397659689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14816.

The product of its digits is 22044960, while the sum is 62.

The square root of 397659689 is about 19941.4063947356. The cubic root of 397659689 is about 735.3665248924.

The spelling of 397659689 in words is "three hundred ninety-seven million, six hundred fifty-nine thousand, six hundred eighty-nine".