397385189 has 2 divisors, whose sum is σ = 397385190. Its totient is φ = 397385188.

The previous prime is 397385147. The next prime is 397385273. The reversal of 397385189 is 981583793.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 394340164 + 3045025 = 19858^2 + 1745^2 .

It is a cyclic number.

It is not a de Polignac number, because 397385189 - 2¹² = 397381093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 397385189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397385389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198692594 + 198692595.

It is an arithmetic number, because the mean of its divisors is an integer number (198692595).

Almost surely, 2^397385189 is an apocalyptic number.

It is an amenable number.

397385189 is a deficient number, since it is larger than the sum of its proper divisors (1).

397385189 is an equidigital number, since it uses as much as digits as its factorization.

397385189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 53.

The square root of 397385189 is about 19934.5225425642. The cubic root of 397385189 is about 735.1972808702.

The spelling of 397385189 in words is "three hundred ninety-seven million, three hundred eighty-five thousand, one hundred eighty-nine".