397679 has 4 divisors (see below), whose sum is σ = 400680. Its totient is φ = 394680.

The previous prime is 397673. The next prime is 397687. The reversal of 397679 is 976793.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 397679 - 2¹² = 393583 is a prime.

It is a d-powerful number, because it can be written as 3³ + 9 + 6⁷ + 7² + 7⁶ + 9 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1292 + ... + 1569.

It is an arithmetic number, because the mean of its divisors is an integer number (100170).

2³⁹⁷⁶⁷⁹ is an apocalyptic number.

397679 is a deficient number, since it is larger than the sum of its proper divisors (3001).

397679 is a wasteful number, since it uses less digits than its factorization.

397679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3000.

The product of its digits is 71442, while the sum is 41.

The square root of 397679 is about 630.6179509021. The cubic root of 397679 is about 73.5378428230.

The spelling of 397679 in words is "three hundred ninety-seven thousand, six hundred seventy-nine".