999600139 has 2 divisors, whose sum is σ = 999600140. Its totient is φ = 999600138.

The previous prime is 999600113. The next prime is 999600149. The reversal of 999600139 is 931006999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999600139 - 2¹³ = 999591947 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (999600149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499800069 + 499800070.

It is an arithmetic number, because the mean of its divisors is an integer number (499800070).

Almost surely, 2^999600139 is an apocalyptic number.

999600139 is a deficient number, since it is larger than the sum of its proper divisors (1).

999600139 is an equidigital number, since it uses as much as digits as its factorization.

999600139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 118098, while the sum is 46.

The square root of 999600139 is about 31616.4536120040. The cubic root of 999600139 is about 999.8666952306.

The spelling of 999600139 in words is "nine hundred ninety-nine million, six hundred thousand, one hundred thirty-nine".