44487581 has 2 divisors, whose sum is σ = 44487582. Its totient is φ = 44487580.

The previous prime is 44487559. The next prime is 44487647. The reversal of 44487581 is 18578444.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42902500 + 1585081 = 6550^2 + 1259^2 .

It is a cyclic number.

It is not a de Polignac number, because 44487581 - 2⁶ = 44487517 is a prime.

It is a super-2 number, since 2×44487581² = 3958289726463122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44487281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22243790 + 22243791.

It is an arithmetic number, because the mean of its divisors is an integer number (22243791).

Almost surely, 2^44487581 is an apocalyptic number.

It is an amenable number.

44487581 is a deficient number, since it is larger than the sum of its proper divisors (1).

44487581 is an equidigital number, since it uses as much as digits as its factorization.

44487581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 143360, while the sum is 41.

The square root of 44487581 is about 6669.9011237049. The cubic root of 44487581 is about 354.3340845815.

The spelling of 44487581 in words is "forty-four million, four hundred eighty-seven thousand, five hundred eighty-one".