389738819 has 2 divisors, whose sum is σ = 389738820. Its totient is φ = 389738818.

The previous prime is 389738813. The next prime is 389738863. The reversal of 389738819 is 918837983.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 389738819 - 2⁴ = 389738803 is a prime.

It is a super-2 number, since 2×389738819² = 303792694071029522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (389738813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194869409 + 194869410.

It is an arithmetic number, because the mean of its divisors is an integer number (194869410).

Almost surely, 2^389738819 is an apocalyptic number.

389738819 is a deficient number, since it is larger than the sum of its proper divisors (1).

389738819 is an equidigital number, since it uses as much as digits as its factorization.

389738819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 56.

The square root of 389738819 is about 19741.8038436208. The cubic root of 389738819 is about 730.4512247550.

The spelling of 389738819 in words is "three hundred eighty-nine million, seven hundred thirty-eight thousand, eight hundred nineteen".