44487913 has 2 divisors, whose sum is σ = 44487914. Its totient is φ = 44487912.

The previous prime is 44487907. The next prime is 44487931. The reversal of 44487913 is 31978444.

Together with next prime (44487931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42029289 + 2458624 = 6483^2 + 1568^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44487913 is a prime.

It is not a weakly prime, because it can be changed into another prime (44487953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22243956 + 22243957.

It is an arithmetic number, because the mean of its divisors is an integer number (22243957).

Almost surely, 2^44487913 is an apocalyptic number.

It is an amenable number.

44487913 is a deficient number, since it is larger than the sum of its proper divisors (1).

44487913 is an equidigital number, since it uses as much as digits as its factorization.

44487913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 40.

The square root of 44487913 is about 6669.9260115836. The cubic root of 44487913 is about 354.3349660156.

The spelling of 44487913 in words is "forty-four million, four hundred eighty-seven thousand, nine hundred thirteen".