397667 has 4 divisors (see below), whose sum is σ = 406176. Its totient is φ = 389160.

The previous prime is 397643. The next prime is 397673. The reversal of 397667 is 766793.

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

It is not a de Polignac number, because 397667 - 2¹² = 393571 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 397667.

It is not an unprimeable number, because it can be changed into a prime (397687) 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, 4184 + ... + 4277.

It is an arithmetic number, because the mean of its divisors is an integer number (101544).

2³⁹⁷⁶⁶⁷ is an apocalyptic number.

397667 is a deficient number, since it is larger than the sum of its proper divisors (8509).

397667 is an equidigital number, since it uses as much as digits as its factorization.

397667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8508.

The product of its digits is 47628, while the sum is 38.

The square root of 397667 is about 630.6084363533. The cubic root of 397667 is about 73.5371031452.

The spelling of 397667 in words is "three hundred ninety-seven thousand, six hundred sixty-seven".