44993987 has 2 divisors, whose sum is σ = 44993988. Its totient is φ = 44993986.

The previous prime is 44993983. The next prime is 44993999. The reversal of 44993987 is 78939944.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 44993987 - 2² = 44993983 is a prime.

It is not a weakly prime, because it can be changed into another prime (44993981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22496993 + 22496994.

It is an arithmetic number, because the mean of its divisors is an integer number (22496994).

Almost surely, 2^44993987 is an apocalyptic number.

44993987 is a deficient number, since it is larger than the sum of its proper divisors (1).

44993987 is an equidigital number, since it uses as much as digits as its factorization.

44993987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 53.

The square root of 44993987 is about 6707.7557349683. The cubic root of 44993987 is about 355.6734870771.

The spelling of 44993987 in words is "forty-four million, nine hundred ninety-three thousand, nine hundred eighty-seven".