389423819 has 2 divisors, whose sum is σ = 389423820. Its totient is φ = 389423818.

The previous prime is 389423809. The next prime is 389423893. The reversal of 389423819 is 918324983.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (918324983) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 389423819 - 2²⁸ = 120988363 is a prime.

It is a super-2 number, since 2×389423819² = 303301821609089522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (389423809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194711909 + 194711910.

It is an arithmetic number, because the mean of its divisors is an integer number (194711910).

Almost surely, 2^389423819 is an apocalyptic number.

389423819 is a deficient number, since it is larger than the sum of its proper divisors (1).

389423819 is an equidigital number, since it uses as much as digits as its factorization.

389423819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 47.

The square root of 389423819 is about 19733.8242365741. The cubic root of 389423819 is about 730.2543799778.

The spelling of 389423819 in words is "three hundred eighty-nine million, four hundred twenty-three thousand, eight hundred nineteen".