244212139 has 2 divisors, whose sum is σ = 244212140. Its totient is φ = 244212138.

The previous prime is 244212127. The next prime is 244212209. The reversal of 244212139 is 931212442.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 244212139 - 2¹¹ = 244210091 is a prime.

It is not a weakly prime, because it can be changed into another prime (244212109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122106069 + 122106070.

It is an arithmetic number, because the mean of its divisors is an integer number (122106070).

Almost surely, 2^244212139 is an apocalyptic number.

244212139 is a deficient number, since it is larger than the sum of its proper divisors (1).

244212139 is an equidigital number, since it uses as much as digits as its factorization.

244212139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 28.

The square root of 244212139 is about 15627.2882804407. The cubic root of 244212139 is about 625.0610193224.

The spelling of 244212139 in words is "two hundred forty-four million, two hundred twelve thousand, one hundred thirty-nine".