999513397 has 2 divisors, whose sum is σ = 999513398. Its totient is φ = 999513396.

The previous prime is 999513367. The next prime is 999513413. The reversal of 999513397 is 793315999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 985080996 + 14432401 = 31386^2 + 3799^2 .

It is a cyclic number.

It is not a de Polignac number, because 999513397 - 2¹¹ = 999511349 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999513337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499756698 + 499756699.

It is an arithmetic number, because the mean of its divisors is an integer number (499756699).

Almost surely, 2^999513397 is an apocalyptic number.

It is an amenable number.

999513397 is a deficient number, since it is larger than the sum of its proper divisors (1).

999513397 is an equidigital number, since it uses as much as digits as its factorization.

999513397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2066715, while the sum is 55.

The square root of 999513397 is about 31615.0817965097. The cubic root of 999513397 is about 999.8377726837.

The spelling of 999513397 in words is "nine hundred ninety-nine million, five hundred thirteen thousand, three hundred ninety-seven".