1239044069 has 2 divisors, whose sum is σ = 1239044070. Its totient is φ = 1239044068.

The previous prime is 1239044047. The next prime is 1239044083. The reversal of 1239044069 is 9604409321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1084911844 + 154132225 = 32938^2 + 12415^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1239044069 is a prime.

It is a super-2 number, since 2×1239044069² = 3070460409848153522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1239044039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 619522034 + 619522035.

It is an arithmetic number, because the mean of its divisors is an integer number (619522035).

Almost surely, 2^1239044069 is an apocalyptic number.

It is an amenable number.

1239044069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1239044069 is an equidigital number, since it uses as much as digits as its factorization.

1239044069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 1239044069 is about 35200.0577982480. The cubic root of 1239044069 is about 1074.0609268678.

The spelling of 1239044069 in words is "one billion, two hundred thirty-nine million, forty-four thousand, sixty-nine".