3139239823 has 2 divisors, whose sum is σ = 3139239824. Its totient is φ = 3139239822.

The previous prime is 3139239787. The next prime is 3139239863. The reversal of 3139239823 is 3289329313.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3139239823 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3139239823.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3139239863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1569619911 + 1569619912.

It is an arithmetic number, because the mean of its divisors is an integer number (1569619912).

Almost surely, 2^3139239823 is an apocalyptic number.

3139239823 is a deficient number, since it is larger than the sum of its proper divisors (1).

3139239823 is an equidigital number, since it uses as much as digits as its factorization.

3139239823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 43.

The square root of 3139239823 is about 56028.9195237602. The cubic root of 3139239823 is about 1464.2261710193.

The spelling of 3139239823 in words is "three billion, one hundred thirty-nine million, two hundred thirty-nine thousand, eight hundred twenty-three".