999412313 has 2 divisors, whose sum is σ = 999412314. Its totient is φ = 999412312.

The previous prime is 999412301. The next prime is 999412339. The reversal of 999412313 is 313214999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 993321289 + 6091024 = 31517^2 + 2468^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999412313 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_50819396 and since 999412313 and 50819396 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (999412343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499706156 + 499706157.

It is an arithmetic number, because the mean of its divisors is an integer number (499706157).

Almost surely, 2^999412313 is an apocalyptic number.

It is an amenable number.

999412313 is a deficient number, since it is larger than the sum of its proper divisors (1).

999412313 is an equidigital number, since it uses as much as digits as its factorization.

999412313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52488, while the sum is 41.

The square root of 999412313 is about 31613.4830887076. The cubic root of 999412313 is about 999.8040659457.

The spelling of 999412313 in words is "nine hundred ninety-nine million, four hundred twelve thousand, three hundred thirteen".