9973819 has 2 divisors, whose sum is σ = 9973820. Its totient is φ = 9973818.

The previous prime is 9973813. The next prime is 9973837. The reversal of 9973819 is 9183799.

9973819 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (9183799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9973819 - 2³ = 9973811 is a prime.

It is a super-2 number, since 2×9973819² = 198954130889522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9973811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4986909 + 4986910.

It is an arithmetic number, because the mean of its divisors is an integer number (4986910).

Almost surely, 2^9973819 is an apocalyptic number.

9973819 is a deficient number, since it is larger than the sum of its proper divisors (1).

9973819 is an equidigital number, since it uses as much as digits as its factorization.

9973819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 46.

The square root of 9973819 is about 3158.1353675864. The cubic root of 9973819 is about 215.2552871658.

The spelling of 9973819 in words is "nine million, nine hundred seventy-three thousand, eight hundred nineteen".