397693439 has 8 divisors (see below), whose sum is σ = 467220432. Its totient is φ = 333728640.

The previous prime is 397693411. The next prime is 397693469. The reversal of 397693439 is 934396793.

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

It is a cyclic number.

It is not a de Polignac number, because 397693439 - 2⁸ = 397693183 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 (397693409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1390394 + ... + 1390679.

It is an arithmetic number, because the mean of its divisors is an integer number (58402554).

Almost surely, 2^397693439 is an apocalyptic number.

397693439 is a deficient number, since it is larger than the sum of its proper divisors (69526993).

397693439 is a wasteful number, since it uses less digits than its factorization.

397693439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2781097.

The product of its digits is 3306744, while the sum is 53.

The square root of 397693439 is about 19942.2526059620. The cubic root of 397693439 is about 735.3873282064.

The spelling of 397693439 in words is "three hundred ninety-seven million, six hundred ninety-three thousand, four hundred thirty-nine".