397973 has 2 divisors, whose sum is σ = 397974. Its totient is φ = 397972.

The previous prime is 397963. The next prime is 397981. The reversal of 397973 is 379793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 232324 + 165649 = 482^2 + 407^2 .

It is a cyclic number.

It is not a de Polignac number, because 397973 - 2¹⁸ = 135829 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198986 + 198987.

It is an arithmetic number, because the mean of its divisors is an integer number (198987).

2³⁹⁷⁹⁷³ is an apocalyptic number.

It is an amenable number.

397973 is a deficient number, since it is larger than the sum of its proper divisors (1).

397973 is an equidigital number, since it uses as much as digits as its factorization.

397973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35721, while the sum is 38.

The square root of 397973 is about 630.8510125220. The cubic root of 397973 is about 73.5559602830. Note that the first 3 decimals are identical.

The spelling of 397973 in words is "three hundred ninety-seven thousand, nine hundred seventy-three".