397970 has 16 divisors (see below), whose sum is σ = 758808. Its totient is φ = 149760.

The previous prime is 397963. The next prime is 397973. The reversal of 397970 is 79793.

It can be written as a sum of positive squares in 4 ways, for example, as 375769 + 22201 = 613^2 + 149^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 397970.

It is not an unprimeable number, because it can be changed into a prime (397973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1001 + ... + 1340.

2³⁹⁷⁹⁷⁰ is an apocalyptic number.

397970 is a deficient number, since it is larger than the sum of its proper divisors (360838).

397970 is a wasteful number, since it uses less digits than its factorization.

397970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2365.

The product of its (nonzero) digits is 11907, while the sum is 35.

The square root of 397970 is about 630.8486347770. The cubic root of 397970 is about 73.5557754561. Note that the first 3 decimals are identical.

The spelling of 397970 in words is "three hundred ninety-seven thousand, nine hundred seventy".