397996439 has 8 divisors (see below), whose sum is σ = 437159040. Its totient is φ = 360655416.

The previous prime is 397996421. The next prime is 397996447. The reversal of 397996439 is 934699793.

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

It is not a de Polignac number, because 397996439 - 2¹⁶ = 397930903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397996409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 454937 + ... + 455810.

It is an arithmetic number, because the mean of its divisors is an integer number (54644880).

Almost surely, 2^397996439 is an apocalyptic number.

397996439 is a deficient number, since it is larger than the sum of its proper divisors (39162601).

397996439 is a wasteful number, since it uses less digits than its factorization.

397996439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910789.

The product of its digits is 9920232, while the sum is 59.

The square root of 397996439 is about 19949.8480946598. The cubic root of 397996439 is about 735.5740430421.

The spelling of 397996439 in words is "three hundred ninety-seven million, nine hundred ninety-six thousand, four hundred thirty-nine".