397266839 has 8 divisors (see below), whose sum is σ = 418367280. Its totient is φ = 376185600.

The previous prime is 397266827. The next prime is 397266847. The reversal of 397266839 is 938662793.

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 397266839 - 2⁴ = 397266823 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 (397266739) 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, 60749 + ... + 66969.

It is an arithmetic number, because the mean of its divisors is an integer number (52295910).

Almost surely, 2^397266839 is an apocalyptic number.

397266839 is a deficient number, since it is larger than the sum of its proper divisors (21100441).

397266839 is a wasteful number, since it uses less digits than its factorization.

397266839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9601.

The product of its digits is 2939328, while the sum is 53.

The square root of 397266839 is about 19931.5538531244. The cubic root of 397266839 is about 735.1242876804.

The spelling of 397266839 in words is "three hundred ninety-seven million, two hundred sixty-six thousand, eight hundred thirty-nine".