397066 has 4 divisors (see below), whose sum is σ = 595602. Its totient is φ = 198532.

The previous prime is 397063. The next prime is 397073. The reversal of 397066 is 660793.

397066 = T₅₁₃ + T₅₁₄ + T₅₁₅.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 660793 = 7 ⋅94399.

It can be written as a sum of positive squares in only one way, i.e., 319225 + 77841 = 565^2 + 279^2 .

It is a super-2 number, since 2×397066² = 315322816712, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (397063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99265 + ... + 99268.

2³⁹⁷⁰⁶⁶ is an apocalyptic number.

397066 is the 515-th centered triangular number.

397066 is a deficient number, since it is larger than the sum of its proper divisors (198536).

397066 is a wasteful number, since it uses less digits than its factorization.

397066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198535.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 397066 is about 630.1317322592. The cubic root of 397066 is about 73.5000385642.

The spelling of 397066 in words is "three hundred ninety-seven thousand, sixty-six".