397929679 has 8 divisors (see below), whose sum is σ = 458949920. Its totient is φ = 337952736.

The previous prime is 397929629. The next prime is 397929691. The reversal of 397929679 is 976929793.

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 397929679 - 2¹¹ = 397927631 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 (397929629) 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, 260004 + ... + 261529.

It is an arithmetic number, because the mean of its divisors is an integer number (57368740).

Almost surely, 2^397929679 is an apocalyptic number.

397929679 is a deficient number, since it is larger than the sum of its proper divisors (61020241).

397929679 is a wasteful number, since it uses less digits than its factorization.

397929679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521649.

The product of its digits is 11573604, while the sum is 61.

The square root of 397929679 is about 19948.1748287907. The cubic root of 397929679 is about 735.5329122980.

The spelling of 397929679 in words is "three hundred ninety-seven million, nine hundred twenty-nine thousand, six hundred seventy-nine".