397545097 has 2 divisors, whose sum is σ = 397545098. Its totient is φ = 397545096.

The previous prime is 397545077. The next prime is 397545167. The reversal of 397545097 is 790545793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 322705296 + 74839801 = 17964^2 + 8651^2 .

It is a cyclic number.

It is not a de Polignac number, because 397545097 - 2¹⁹ = 397020809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 397545097.

It is not a weakly prime, because it can be changed into another prime (397545007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198772548 + 198772549.

It is an arithmetic number, because the mean of its divisors is an integer number (198772549).

Almost surely, 2^397545097 is an apocalyptic number.

It is an amenable number.

397545097 is a deficient number, since it is larger than the sum of its proper divisors (1).

397545097 is an equidigital number, since it uses as much as digits as its factorization.

397545097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1190700, while the sum is 49.

The square root of 397545097 is about 19938.5329701059. The cubic root of 397545097 is about 735.2958822309.

The spelling of 397545097 in words is "three hundred ninety-seven million, five hundred forty-five thousand, ninety-seven".