999620329 has 2 divisors, whose sum is σ = 999620330. Its totient is φ = 999620328.

The previous prime is 999620311. The next prime is 999620339. The reversal of 999620329 is 923026999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 981130329 + 18490000 = 31323^2 + 4300^2 .

It is a cyclic number.

It is not a de Polignac number, because 999620329 - 2⁷ = 999620201 is a prime.

It is not a weakly prime, because it can be changed into another prime (999620339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499810164 + 499810165.

It is an arithmetic number, because the mean of its divisors is an integer number (499810165).

Almost surely, 2^999620329 is an apocalyptic number.

It is an amenable number.

999620329 is a deficient number, since it is larger than the sum of its proper divisors (1).

999620329 is an equidigital number, since it uses as much as digits as its factorization.

999620329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 472392, while the sum is 49.

The square root of 999620329 is about 31616.7729061649. The cubic root of 999620329 is about 999.8734269799.

The spelling of 999620329 in words is "nine hundred ninety-nine million, six hundred twenty thousand, three hundred twenty-nine".