39964489 has 2 divisors, whose sum is σ = 39964490. Its totient is φ = 39964488.

The previous prime is 39964469. The next prime is 39964511. The reversal of 39964489 is 98446993.

39964489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39879225 + 85264 = 6315^2 + 292^2 .

It is an emirp because it is prime and its reverse (98446993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39964489 - 2⁹ = 39963977 is a prime.

It is a super-2 number, since 2×39964489² = 3194320762062242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (39964469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19982244 + 19982245.

It is an arithmetic number, because the mean of its divisors is an integer number (19982245).

Almost surely, 2^39964489 is an apocalyptic number.

It is an amenable number.

39964489 is a deficient number, since it is larger than the sum of its proper divisors (1).

39964489 is an equidigital number, since it uses as much as digits as its factorization.

39964489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1679616, while the sum is 52.

The square root of 39964489 is about 6321.7473059274. The cubic root of 39964489 is about 341.8939544451.

The spelling of 39964489 in words is "thirty-nine million, nine hundred sixty-four thousand, four hundred eighty-nine".