999307513 has 2 divisors, whose sum is σ = 999307514. Its totient is φ = 999307512.

The previous prime is 999307511. The next prime is 999307559. The reversal of 999307513 is 315703999.

It is an a-pointer prime, because the next prime (999307559) can be obtained adding 999307513 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 563207824 + 436099689 = 23732^2 + 20883^2 .

It is a cyclic number.

It is not a de Polignac number, because 999307513 - 2¹ = 999307511 is a prime.

Together with 999307511, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (999307511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499653756 + 499653757.

It is an arithmetic number, because the mean of its divisors is an integer number (499653757).

Almost surely, 2^999307513 is an apocalyptic number.

It is an amenable number.

999307513 is a deficient number, since it is larger than the sum of its proper divisors (1).

999307513 is an equidigital number, since it uses as much as digits as its factorization.

999307513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 229635, while the sum is 46.

The square root of 999307513 is about 31611.8255246356. The cubic root of 999307513 is about 999.7691176975.

The spelling of 999307513 in words is "nine hundred ninety-nine million, three hundred seven thousand, five hundred thirteen".