999370013 has 2 divisors, whose sum is σ = 999370014. Its totient is φ = 999370012.

The previous prime is 999369991. The next prime is 999370087. The reversal of 999370013 is 310073999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 644499769 + 354870244 = 25387^2 + 18838^2 .

It is a cyclic number.

It is not a de Polignac number, because 999370013 - 2⁶ = 999369949 is a prime.

It is a super-3 number, since 3×999370013³ (a number of 28 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999370093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499685006 + 499685007.

It is an arithmetic number, because the mean of its divisors is an integer number (499685007).

Almost surely, 2^999370013 is an apocalyptic number.

It is an amenable number.

999370013 is a deficient number, since it is larger than the sum of its proper divisors (1).

999370013 is an equidigital number, since it uses as much as digits as its factorization.

999370013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45927, while the sum is 41.

The square root of 999370013 is about 31612.8140632877. The cubic root of 999370013 is about 999.7899602197.

The spelling of 999370013 in words is "nine hundred ninety-nine million, three hundred seventy thousand, thirteen".