397123219 has 4 divisors (see below), whose sum is σ = 397432120. Its totient is φ = 396814320.

The previous prime is 397123193. The next prime is 397123241. The reversal of 397123219 is 912321793.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 912321793 = 353 ⋅2584481.

It is a cyclic number.

It is not a de Polignac number, because 397123219 - 2¹¹ = 397121171 is a prime.

It is a super-2 number, since 2×397123219² = 315413702137843922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397123249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152514 + ... + 155095.

It is an arithmetic number, because the mean of its divisors is an integer number (99358030).

Almost surely, 2^397123219 is an apocalyptic number.

397123219 is a deficient number, since it is larger than the sum of its proper divisors (308901).

397123219 is a wasteful number, since it uses less digits than its factorization.

397123219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308900.

The product of its digits is 20412, while the sum is 37.

The square root of 397123219 is about 19927.9506974501. The cubic root of 397123219 is about 735.0356895684.

The spelling of 397123219 in words is "three hundred ninety-seven million, one hundred twenty-three thousand, two hundred nineteen".