397402219 has 2 divisors, whose sum is σ = 397402220. Its totient is φ = 397402218.

The previous prime is 397402199. The next prime is 397402223. The reversal of 397402219 is 912204793.

It is a strong prime.

It is an emirp because it is prime and its reverse (912204793) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 397402219 - 2¹⁹ = 396877931 is a prime.

It is a super-2 number, since 2×397402219² = 315857047332247922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (397403219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198701109 + 198701110.

It is an arithmetic number, because the mean of its divisors is an integer number (198701110).

Almost surely, 2^397402219 is an apocalyptic number.

397402219 is a deficient number, since it is larger than the sum of its proper divisors (1).

397402219 is an equidigital number, since it uses as much as digits as its factorization.

397402219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 397402219 is about 19934.9496864176. The cubic root of 397402219 is about 735.2077830489.

The spelling of 397402219 in words is "three hundred ninety-seven million, four hundred two thousand, two hundred nineteen".