397954 has 4 divisors (see below), whose sum is σ = 596934. Its totient is φ = 198976.

The previous prime is 397951. The next prime is 397963. The reversal of 397954 is 459793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 459793 = 23 ⋅19991.

It can be written as a sum of positive squares in only one way, i.e., 332929 + 65025 = 577^2 + 255^2 .

It is a super-2 number, since 2×397954² = 316734772232, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (397951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99487 + ... + 99490.

2³⁹⁷⁹⁵⁴ is an apocalyptic number.

397954 is a deficient number, since it is larger than the sum of its proper divisors (198980).

397954 is a wasteful number, since it uses less digits than its factorization.

397954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198979.

The product of its digits is 34020, while the sum is 37.

The square root of 397954 is about 630.8359533191. The cubic root of 397954 is about 73.5547896965.

The spelling of 397954 in words is "three hundred ninety-seven thousand, nine hundred fifty-four".