999653939 has 2 divisors, whose sum is σ = 999653940. Its totient is φ = 999653938.

The previous prime is 999653917. The next prime is 999653959. The reversal of 999653939 is 939356999.

999653939 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 999653939 - 2¹² = 999649843 is a prime.

It is not a weakly prime, because it can be changed into another prime (999653959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499826969 + 499826970.

It is an arithmetic number, because the mean of its divisors is an integer number (499826970).

Almost surely, 2^999653939 is an apocalyptic number.

999653939 is a deficient number, since it is larger than the sum of its proper divisors (1).

999653939 is an equidigital number, since it uses as much as digits as its factorization.

999653939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15943230, while the sum is 62.

The square root of 999653939 is about 31617.3044233692. The cubic root of 999653939 is about 999.8846330243.

The spelling of 999653939 in words is "nine hundred ninety-nine million, six hundred fifty-three thousand, nine hundred thirty-nine".