44557987 has 2 divisors, whose sum is σ = 44557988. Its totient is φ = 44557986.

The previous prime is 44557973. The next prime is 44558009. The reversal of 44557987 is 78975544.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 44557987 - 2⁷ = 44557859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 44557987.

It is not a weakly prime, because it can be changed into another prime (44557937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22278993 + 22278994.

It is an arithmetic number, because the mean of its divisors is an integer number (22278994).

Almost surely, 2^44557987 is an apocalyptic number.

44557987 is a deficient number, since it is larger than the sum of its proper divisors (1).

44557987 is an equidigital number, since it uses as much as digits as its factorization.

44557987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1411200, while the sum is 49.

The square root of 44557987 is about 6675.1769264942. The cubic root of 44557987 is about 354.5209089795.

The spelling of 44557987 in words is "forty-four million, five hundred fifty-seven thousand, nine hundred eighty-seven".