397899 has 8 divisors (see below), whose sum is σ = 589520. Its totient is φ = 265248.

The previous prime is 397897. The next prime is 397907. The reversal of 397899 is 998793.

It is a happy number.

It is not a de Polignac number, because 397899 - 2¹ = 397897 is a prime.

It is a super-2 number, since 2×397899² = 316647228402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397897) 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, 7342 + ... + 7395.

It is an arithmetic number, because the mean of its divisors is an integer number (73690).

2³⁹⁷⁸⁹⁹ is an apocalyptic number.

397899 is a deficient number, since it is larger than the sum of its proper divisors (191621).

397899 is a wasteful number, since it uses less digits than its factorization.

397899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14746 (or 14740 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 397899 is about 630.7923588630. The cubic root of 397899 is about 73.5514009466.

It can be divided in two parts, 397 and 899, that added together give a 4-th power (1296 = 6⁴).

The spelling of 397899 in words is "three hundred ninety-seven thousand, eight hundred ninety-nine".