39219979 has 2 divisors, whose sum is σ = 39219980. Its totient is φ = 39219978.

The previous prime is 39219953. The next prime is 39219997. The reversal of 39219979 is 97991293.

39219979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (39219997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39219979 - 2¹¹ = 39217931 is a prime.

It is not a weakly prime, because it can be changed into another prime (39219779) 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, 19609989 + 19609990.

It is an arithmetic number, because the mean of its divisors is an integer number (19609990).

Almost surely, 2^39219979 is an apocalyptic number.

39219979 is a deficient number, since it is larger than the sum of its proper divisors (1).

39219979 is an equidigital number, since it uses as much as digits as its factorization.

39219979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 275562, while the sum is 49.

The square root of 39219979 is about 6262.5856481169. The cubic root of 39219979 is about 339.7575520693.

The spelling of 39219979 in words is "thirty-nine million, two hundred nineteen thousand, nine hundred seventy-nine".