1239623039 has 2 divisors, whose sum is σ = 1239623040. Its totient is φ = 1239623038.

The previous prime is 1239623027. The next prime is 1239623081. The reversal of 1239623039 is 9303269321.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1239623039 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1239622993 and 1239623011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1239023039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 619811519 + 619811520.

It is an arithmetic number, because the mean of its divisors is an integer number (619811520).

Almost surely, 2^1239623039 is an apocalyptic number.

1239623039 is a deficient number, since it is larger than the sum of its proper divisors (1).

1239623039 is an equidigital number, since it uses as much as digits as its factorization.

1239623039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 38.

The square root of 1239623039 is about 35208.2808299411. The cubic root of 1239623039 is about 1074.2281935099.

The spelling of 1239623039 in words is "one billion, two hundred thirty-nine million, six hundred twenty-three thousand, thirty-nine".