39544961 has 2 divisors, whose sum is σ = 39544962. Its totient is φ = 39544960.

The previous prime is 39544957. The next prime is 39544963. The reversal of 39544961 is 16944593.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38056561 + 1488400 = 6169^2 + 1220^2 .

It is an emirp because it is prime and its reverse (16944593) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39544961 - 2² = 39544957 is a prime.

Together with 39544963, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (39544963) 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, 19772480 + 19772481.

It is an arithmetic number, because the mean of its divisors is an integer number (19772481).

Almost surely, 2^39544961 is an apocalyptic number.

It is an amenable number.

39544961 is a deficient number, since it is larger than the sum of its proper divisors (1).

39544961 is an equidigital number, since it uses as much as digits as its factorization.

39544961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 41.

The square root of 39544961 is about 6288.4784328166. The cubic root of 39544961 is about 340.6933974929.

The spelling of 39544961 in words is "thirty-nine million, five hundred forty-four thousand, nine hundred sixty-one".