999975329 has 2 divisors, whose sum is σ = 999975330. Its totient is φ = 999975328.

The previous prime is 999975299. The next prime is 999975331. The reversal of 999975329 is 923579999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 601573729 + 398401600 = 24527^2 + 19960^2 .

It is a cyclic number.

It is not a de Polignac number, because 999975329 - 2²⁴ = 983198113 is a prime.

Together with 999975331, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (999975359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499987664 + 499987665.

It is an arithmetic number, because the mean of its divisors is an integer number (499987665).

Almost surely, 2^999975329 is an apocalyptic number.

It is an amenable number.

999975329 is a deficient number, since it is larger than the sum of its proper divisors (1).

999975329 is an equidigital number, since it uses as much as digits as its factorization.

999975329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12400290, while the sum is 62.

The square root of 999975329 is about 31622.3865165171. The cubic root of 999975329 is about 999.9917762657.

The spelling of 999975329 in words is "nine hundred ninety-nine million, nine hundred seventy-five thousand, three hundred twenty-nine".