999317929 has 2 divisors, whose sum is σ = 999317930. Its totient is φ = 999317928.

The previous prime is 999317903. The next prime is 999318037. The reversal of 999317929 is 929713999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 753612304 + 245705625 = 27452^2 + 15675^2 .

It is an emirp because it is prime and its reverse (929713999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999317929 - 2⁷ = 999317801 is a prime.

It is not a weakly prime, because it can be changed into another prime (999317029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499658964 + 499658965.

It is an arithmetic number, because the mean of its divisors is an integer number (499658965).

Almost surely, 2^999317929 is an apocalyptic number.

It is an amenable number.

999317929 is a deficient number, since it is larger than the sum of its proper divisors (1).

999317929 is an equidigital number, since it uses as much as digits as its factorization.

999317929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2480058, while the sum is 58.

The square root of 999317929 is about 31611.9902726798. The cubic root of 999317929 is about 999.7725912892.

The spelling of 999317929 in words is "nine hundred ninety-nine million, three hundred seventeen thousand, nine hundred twenty-nine".