1244440039 has 2 divisors, whose sum is σ = 1244440040. Its totient is φ = 1244440038.

The previous prime is 1244440033. The next prime is 1244440151. The reversal of 1244440039 is 9300444421.

It is a weak prime.

It is an emirp because it is prime and its reverse (9300444421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1244440039 - 2³ = 1244440031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1244440031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622220019 + 622220020.

It is an arithmetic number, because the mean of its divisors is an integer number (622220020).

Almost surely, 2^1244440039 is an apocalyptic number.

1244440039 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244440039 is an equidigital number, since it uses as much as digits as its factorization.

1244440039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 1244440039 is about 35276.6217061668. The cubic root of 1244440039 is about 1075.6178280857.

The spelling of 1244440039 in words is "one billion, two hundred forty-four million, four hundred forty thousand, thirty-nine".