39447049 has 2 divisors, whose sum is σ = 39447050. Its totient is φ = 39447048.

The previous prime is 39447017. The next prime is 39447071. The reversal of 39447049 is 94074493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39438400 + 8649 = 6280^2 + 93^2 .

It is an emirp because it is prime and its reverse (94074493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39447049 - 2⁵ = 39447017 is a prime.

It is not a weakly prime, because it can be changed into another prime (39447949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19723524 + 19723525.

It is an arithmetic number, because the mean of its divisors is an integer number (19723525).

Almost surely, 2^39447049 is an apocalyptic number.

It is an amenable number.

39447049 is a deficient number, since it is larger than the sum of its proper divisors (1).

39447049 is an equidigital number, since it uses as much as digits as its factorization.

39447049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 39447049 is about 6280.6885768998. The cubic root of 39447049 is about 340.4119832908.

The spelling of 39447049 in words is "thirty-nine million, four hundred forty-seven thousand, forty-nine".