397659 has 16 divisors (see below), whose sum is σ = 562464. Its totient is φ = 249600.

The previous prime is 397643. The next prime is 397673. The reversal of 397659 is 956793.

It is not a de Polignac number, because 397659 - 2⁴ = 397643 is a prime.

It is a nialpdrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (397259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6489 + ... + 6549.

It is an arithmetic number, because the mean of its divisors is an integer number (35154).

2³⁹⁷⁶⁵⁹ is an apocalyptic number.

397659 is a deficient number, since it is larger than the sum of its proper divisors (164805).

397659 is a wasteful number, since it uses less digits than its factorization.

397659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158.

The product of its digits is 51030, while the sum is 39.

The square root of 397659 is about 630.6020932411. The cubic root of 397659 is about 73.5366100184.

The spelling of 397659 in words is "three hundred ninety-seven thousand, six hundred fifty-nine".