999313129 has 2 divisors, whose sum is σ = 999313130. Its totient is φ = 999313128.

The previous prime is 999313121. The next prime is 999313141. The reversal of 999313129 is 921313999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 683717904 + 315595225 = 26148^2 + 17765^2 .

It is a cyclic number.

It is not a de Polignac number, because 999313129 - 2³ = 999313121 is a prime.

It is not a weakly prime, because it can be changed into another prime (999313121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499656564 + 499656565.

It is an arithmetic number, because the mean of its divisors is an integer number (499656565).

Almost surely, 2^999313129 is an apocalyptic number.

It is an amenable number.

999313129 is a deficient number, since it is larger than the sum of its proper divisors (1).

999313129 is an equidigital number, since it uses as much as digits as its factorization.

999313129 is an evil number, because the sum of its binary digits is even.

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

The square root of 999313129 is about 31611.9143520287. The cubic root of 999313129 is about 999.7709905587.

The spelling of 999313129 in words is "nine hundred ninety-nine million, three hundred thirteen thousand, one hundred twenty-nine".