397941197 has 2 divisors, whose sum is σ = 397941198. Its totient is φ = 397941196.

The previous prime is 397941107. The next prime is 397941211. The reversal of 397941197 is 791149793.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 307862116 + 90079081 = 17546^2 + 9491^2 .

It is a cyclic number.

It is not a de Polignac number, because 397941197 - 2⁸ = 397940941 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397941107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198970598 + 198970599.

It is an arithmetic number, because the mean of its divisors is an integer number (198970599).

Almost surely, 2^397941197 is an apocalyptic number.

It is an amenable number.

397941197 is a deficient number, since it is larger than the sum of its proper divisors (1).

397941197 is an equidigital number, since it uses as much as digits as its factorization.

397941197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 428652, while the sum is 50.

The square root of 397941197 is about 19948.4635247931. The cubic root of 397941197 is about 735.5400088503.

The spelling of 397941197 in words is "three hundred ninety-seven million, nine hundred forty-one thousand, one hundred ninety-seven".