44013509 has 2 divisors, whose sum is σ = 44013510. Its totient is φ = 44013508.

The previous prime is 44013499. The next prime is 44013517. The reversal of 44013509 is 90531044.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23961025 + 20052484 = 4895^2 + 4478^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44013509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44013569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22006754 + 22006755.

It is an arithmetic number, because the mean of its divisors is an integer number (22006755).

Almost surely, 2^44013509 is an apocalyptic number.

It is an amenable number.

44013509 is a deficient number, since it is larger than the sum of its proper divisors (1).

44013509 is an equidigital number, since it uses as much as digits as its factorization.

44013509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 44013509 is about 6634.2677817526. The cubic root of 44013509 is about 353.0709597415.

The spelling of 44013509 in words is "forty-four million, thirteen thousand, five hundred nine".