44401997 has 2 divisors, whose sum is σ = 44401998. Its totient is φ = 44401996.

The previous prime is 44401991. The next prime is 44401999. The reversal of 44401997 is 79910444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31685641 + 12716356 = 5629^2 + 3566^2 .

It is a cyclic number.

It is not a de Polignac number, because 44401997 - 2⁸ = 44401741 is a prime.

Together with 44401999, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 44401997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44401991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22200998 + 22200999.

It is an arithmetic number, because the mean of its divisors is an integer number (22200999).

Almost surely, 2^44401997 is an apocalyptic number.

It is an amenable number.

44401997 is a deficient number, since it is larger than the sum of its proper divisors (1).

44401997 is an equidigital number, since it uses as much as digits as its factorization.

44401997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 44401997 is about 6663.4823478419. The cubic root of 44401997 is about 354.1067192901.

The spelling of 44401997 in words is "forty-four million, four hundred one thousand, nine hundred ninety-seven".