389479823 has 2 divisors, whose sum is σ = 389479824. Its totient is φ = 389479822.

The previous prime is 389479799. The next prime is 389479837. The reversal of 389479823 is 328974983.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 389479823 - 2⁶ = 389479759 is a prime.

It is a super-2 number, since 2×389479823² = 303389065048222658, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389479873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194739911 + 194739912.

It is an arithmetic number, because the mean of its divisors is an integer number (194739912).

Almost surely, 2^389479823 is an apocalyptic number.

389479823 is a deficient number, since it is larger than the sum of its proper divisors (1).

389479823 is an equidigital number, since it uses as much as digits as its factorization.

389479823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 53.

The square root of 389479823 is about 19735.2431705312. The cubic root of 389479823 is about 730.2893848610.

The spelling of 389479823 in words is "three hundred eighty-nine million, four hundred seventy-nine thousand, eight hundred twenty-three".