397984319 has 4 divisors (see below), whose sum is σ = 398048040. Its totient is φ = 397920600.

The previous prime is 397984303. The next prime is 397984357. The reversal of 397984319 is 913489793.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 397984319 - 2⁴ = 397984303 is a prime.

It is a super-2 number, since 2×397984319² = 316783036339787522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397984369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21332 + ... + 35369.

It is an arithmetic number, because the mean of its divisors is an integer number (99512010).

Almost surely, 2^397984319 is an apocalyptic number.

397984319 is a deficient number, since it is larger than the sum of its proper divisors (63721).

397984319 is an equidigital number, since it uses as much as digits as its factorization.

397984319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63720.

The product of its digits is 1469664, while the sum is 53.

The square root of 397984319 is about 19949.5443306357. The cubic root of 397984319 is about 735.5665762685.

The spelling of 397984319 in words is "three hundred ninety-seven million, nine hundred eighty-four thousand, three hundred nineteen".