397178 has 4 divisors (see below), whose sum is σ = 595770. Its totient is φ = 198588.

The previous prime is 397153. The next prime is 397181. The reversal of 397178 is 871793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 871793 = 13 ⋅67061.

It can be written as a sum of positive squares in only one way, i.e., 299209 + 97969 = 547^2 + 313^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99293 + ... + 99296.

2³⁹⁷¹⁷⁸ is an apocalyptic number.

397178 is a deficient number, since it is larger than the sum of its proper divisors (198592).

397178 is a wasteful number, since it uses less digits than its factorization.

397178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198591.

The product of its digits is 10584, while the sum is 35.

The square root of 397178 is about 630.2205962994. The cubic root of 397178 is about 73.5069486080.

It can be divided in two parts, 397 and 178, that added together give a palindrome (575).

The spelling of 397178 in words is "three hundred ninety-seven thousand, one hundred seventy-eight".