44138911 has 2 divisors, whose sum is σ = 44138912. Its totient is φ = 44138910.

The previous prime is 44138893. The next prime is 44138917. The reversal of 44138911 is 11983144.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 44138911 - 2²¹ = 42041759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44138917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22069455 + 22069456.

It is an arithmetic number, because the mean of its divisors is an integer number (22069456).

Almost surely, 2^44138911 is an apocalyptic number.

44138911 is a deficient number, since it is larger than the sum of its proper divisors (1).

44138911 is an equidigital number, since it uses as much as digits as its factorization.

44138911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 31.

The square root of 44138911 is about 6643.7121400615. The cubic root of 44138911 is about 353.4059615940.

The spelling of 44138911 in words is "forty-four million, one hundred thirty-eight thousand, nine hundred eleven".