1244377139 has 2 divisors, whose sum is σ = 1244377140. Its totient is φ = 1244377138.

The previous prime is 1244377117. The next prime is 1244377163. The reversal of 1244377139 is 9317734421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1244377139 - 2⁸ = 1244376883 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1244377096 and 1244377105.

It is not a weakly prime, because it can be changed into another prime (1244377109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622188569 + 622188570.

It is an arithmetic number, because the mean of its divisors is an integer number (622188570).

Almost surely, 2^1244377139 is an apocalyptic number.

1244377139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244377139 is an equidigital number, since it uses as much as digits as its factorization.

1244377139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 41.

The square root of 1244377139 is about 35275.7301696223. The cubic root of 1244377139 is about 1075.5997054765.

The spelling of 1244377139 in words is "one billion, two hundred forty-four million, three hundred seventy-seven thousand, one hundred thirty-nine".