1239385923 has 6 divisors (see below), whose sum is σ = 1790224124. Its totient is φ = 826257276.

The previous prime is 1239385909. The next prime is 1239385933. The reversal of 1239385923 is 3295839321.

1239385923 is a `hidden beast` number, since 1 + 23 + 9 + 38 + 592 + 3 = 666.

It is not a de Polignac number, because 1239385923 - 2⁴ = 1239385907 is a prime.

It is a super-2 number, since 2×1239385923² = 3072154932261123858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1239385933) 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 5 ways as a sum of consecutive naturals, for example, 68854765 + ... + 68854782.

Almost surely, 2^1239385923 is an apocalyptic number.

1239385923 is a deficient number, since it is larger than the sum of its proper divisors (550838201).

1239385923 is a wasteful number, since it uses less digits than its factorization.

1239385923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137709553 (or 137709550 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 1239385923 is about 35204.9133360672. The cubic root of 1239385923 is about 1074.1596960913.

The spelling of 1239385923 in words is "one billion, two hundred thirty-nine million, three hundred eighty-five thousand, nine hundred twenty-three".