9969919 has 2 divisors, whose sum is σ = 9969920. Its totient is φ = 9969918.

The previous prime is 9969913. The next prime is 9969923. The reversal of 9969919 is 9199699.

9969919 is digitally balanced in base 2 and base 3, because in such bases 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 9969919 - 2⁵ = 9969887 is a prime.

It is a super-2 number, since 2×9969919² = 198798569733122, which contains 22 as substring.

9969919 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9969913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4984959 + 4984960.

It is an arithmetic number, because the mean of its divisors is an integer number (4984960).

Almost surely, 2^9969919 is an apocalyptic number.

9969919 is a deficient number, since it is larger than the sum of its proper divisors (1).

9969919 is an equidigital number, since it uses as much as digits as its factorization.

9969919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 354294, while the sum is 52.

The square root of 9969919 is about 3157.5178542646. The cubic root of 9969919 is about 215.2272268657.

The spelling of 9969919 in words is "nine million, nine hundred sixty-nine thousand, nine hundred nineteen".