39964949 has 2 divisors, whose sum is σ = 39964950. Its totient is φ = 39964948.

The previous prime is 39964919. The next prime is 39964997. The reversal of 39964949 is 94946993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36084049 + 3880900 = 6007^2 + 1970^2 .

It is an emirp because it is prime and its reverse (94946993) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39964949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39964949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39964919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19982474 + 19982475.

It is an arithmetic number, because the mean of its divisors is an integer number (19982475).

Almost surely, 2^39964949 is an apocalyptic number.

It is an amenable number.

39964949 is a deficient number, since it is larger than the sum of its proper divisors (1).

39964949 is an equidigital number, since it uses as much as digits as its factorization.

39964949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1889568, while the sum is 53.

The square root of 39964949 is about 6321.7836881690. The cubic root of 39964949 is about 341.8952661981.

The spelling of 39964949 in words is "thirty-nine million, nine hundred sixty-four thousand, nine hundred forty-nine".