999478313 has 2 divisors, whose sum is σ = 999478314. Its totient is φ = 999478312.

The previous prime is 999478303. The next prime is 999478339. The reversal of 999478313 is 313874999.

It is a happy number.

999478313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 711395584 + 288082729 = 26672^2 + 16973^2 .

It is a cyclic number.

It is not a de Polignac number, because 999478313 - 2¹⁴ = 999461929 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (999478303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499739156 + 499739157.

It is an arithmetic number, because the mean of its divisors is an integer number (499739157).

Almost surely, 2^999478313 is an apocalyptic number.

It is an amenable number.

999478313 is a deficient number, since it is larger than the sum of its proper divisors (1).

999478313 is an equidigital number, since it uses as much as digits as its factorization.

999478313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1469664, while the sum is 53.

The square root of 999478313 is about 31614.5269298783. The cubic root of 999478313 is about 999.8260740849.

The spelling of 999478313 in words is "nine hundred ninety-nine million, four hundred seventy-eight thousand, three hundred thirteen".