44139889 has 2 divisors, whose sum is σ = 44139890. Its totient is φ = 44139888.

The previous prime is 44139881. The next prime is 44140009. The reversal of 44139889 is 98893144.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24850225 + 19289664 = 4985^2 + 4392^2 .

It is a cyclic number.

It is not a de Polignac number, because 44139889 - 2³ = 44139881 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (44139881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22069944 + 22069945.

It is an arithmetic number, because the mean of its divisors is an integer number (22069945).

Almost surely, 2^44139889 is an apocalyptic number.

It is an amenable number.

44139889 is a deficient number, since it is larger than the sum of its proper divisors (1).

44139889 is an equidigital number, since it uses as much as digits as its factorization.

44139889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 46.

The square root of 44139889 is about 6643.7857430835. The cubic root of 44139889 is about 353.4085717511.

The spelling of 44139889 in words is "forty-four million, one hundred thirty-nine thousand, eight hundred eighty-nine".