999949513 has 2 divisors, whose sum is σ = 999949514. Its totient is φ = 999949512.

The previous prime is 999949501. The next prime is 999949519. The reversal of 999949513 is 315949999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 719956224 + 279993289 = 26832^2 + 16733^2 .

It is a cyclic number.

It is not a de Polignac number, because 999949513 - 2⁹ = 999949001 is a prime.

It is not a weakly prime, because it can be changed into another prime (999949519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499974756 + 499974757.

It is an arithmetic number, because the mean of its divisors is an integer number (499974757).

Almost surely, 2^999949513 is an apocalyptic number.

It is an amenable number.

999949513 is a deficient number, since it is larger than the sum of its proper divisors (1).

999949513 is an equidigital number, since it uses as much as digits as its factorization.

999949513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3542940, while the sum is 58.

The square root of 999949513 is about 31621.9783220468. The cubic root of 999949513 is about 999.9831707168.

The spelling of 999949513 in words is "nine hundred ninety-nine million, nine hundred forty-nine thousand, five hundred thirteen".