397137694 has 8 divisors (see below), whose sum is σ = 605472408. Its totient is φ = 195313560.

The previous prime is 397137667. The next prime is 397137703. The reversal of 397137694 is 496731793.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1627492 + ... + 1627735.

It is an arithmetic number, because the mean of its divisors is an integer number (75684051).

Almost surely, 2^397137694 is an apocalyptic number.

397137694 is a deficient number, since it is larger than the sum of its proper divisors (208334714).

397137694 is a wasteful number, since it uses less digits than its factorization.

397137694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3255290.

The product of its digits is 857304, while the sum is 49.

The square root of 397137694 is about 19928.3138774960. The cubic root of 397137694 is about 735.0446200564.

The spelling of 397137694 in words is "three hundred ninety-seven million, one hundred thirty-seven thousand, six hundred ninety-four".