44139289 has 2 divisors, whose sum is σ = 44139290. Its totient is φ = 44139288.

The previous prime is 44139253. The next prime is 44139307. The reversal of 44139289 is 98293144.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30338064 + 13801225 = 5508^2 + 3715^2 .

It is a cyclic number.

It is not a de Polignac number, because 44139289 - 2⁹ = 44138777 is a prime.

It is not a weakly prime, because it can be changed into another prime (44139239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22069644 + 22069645.

It is an arithmetic number, because the mean of its divisors is an integer number (22069645).

Almost surely, 2^44139289 is an apocalyptic number.

It is an amenable number.

44139289 is a deficient number, since it is larger than the sum of its proper divisors (1).

44139289 is an equidigital number, since it uses as much as digits as its factorization.

44139289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 40.

The square root of 44139289 is about 6643.7405879519. The cubic root of 44139289 is about 353.4069704323.

The spelling of 44139289 in words is "forty-four million, one hundred thirty-nine thousand, two hundred eighty-nine".