44997989 has 2 divisors, whose sum is σ = 44997990. Its totient is φ = 44997988.

The previous prime is 44997977. The next prime is 44997991. The reversal of 44997989 is 98979944.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44289025 + 708964 = 6655^2 + 842^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44997989 is a prime.

It is a super-3 number, since 3×44997989³ (a number of 24 digits) contains 333 as substring.

Together with 44997991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44997949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22498994 + 22498995.

It is an arithmetic number, because the mean of its divisors is an integer number (22498995).

Almost surely, 2^44997989 is an apocalyptic number.

It is an amenable number.

44997989 is a deficient number, since it is larger than the sum of its proper divisors (1).

44997989 is an equidigital number, since it uses as much as digits as its factorization.

44997989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5878656, while the sum is 59.

The square root of 44997989 is about 6708.0540397346. The cubic root of 44997989 is about 355.6840319164.

The spelling of 44997989 in words is "forty-four million, nine hundred ninety-seven thousand, nine hundred eighty-nine".