999938005939 has 2 divisors, whose sum is σ = 999938005940. Its totient is φ = 999938005938.

The previous prime is 999938005909. The next prime is 999938005961. The reversal of 999938005939 is 939500839999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999938005939 - 2⁷ = 999938005811 is a prime.

It is not a weakly prime, because it can be changed into another prime (999938005909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499969002969 + 499969002970.

It is an arithmetic number, because the mean of its divisors is an integer number (499969002970).

Almost surely, 2^999938005939 is an apocalyptic number.

999938005939 is a deficient number, since it is larger than the sum of its proper divisors (1).

999938005939 is an equidigital number, since it uses as much as digits as its factorization.

999938005939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 191318760, while the sum is 73.

The spelling of 999938005939 in words is "nine hundred ninety-nine billion, nine hundred thirty-eight million, five thousand, nine hundred thirty-nine".