39997019 has 2 divisors, whose sum is σ = 39997020. Its totient is φ = 39997018.

The previous prime is 39996997. The next prime is 39997021. The reversal of 39997019 is 91079993.

It is a happy number.

39997019 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39997019 - 2¹² = 39992923 is a prime.

It is a super-2 number, since 2×39997019² = 3199523057772722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 39997021, 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 (39997079) 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, 19998509 + 19998510.

It is an arithmetic number, because the mean of its divisors is an integer number (19998510).

Almost surely, 2^39997019 is an apocalyptic number.

39997019 is a deficient number, since it is larger than the sum of its proper divisors (1).

39997019 is an equidigital number, since it uses as much as digits as its factorization.

39997019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 137781, while the sum is 47.

The square root of 39997019 is about 6324.3196472032. The cubic root of 39997019 is about 341.9866933938.

The spelling of 39997019 in words is "thirty-nine million, nine hundred ninety-seven thousand, nineteen".