999621323 has 2 divisors, whose sum is σ = 999621324. Its totient is φ = 999621322.

The previous prime is 999621313. The next prime is 999621353. The reversal of 999621323 is 323126999.

999621323 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999621323 is a prime.

It is not a weakly prime, because it can be changed into another prime (999621313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499810661 + 499810662.

It is an arithmetic number, because the mean of its divisors is an integer number (499810662).

Almost surely, 2^999621323 is an apocalyptic number.

999621323 is a deficient number, since it is larger than the sum of its proper divisors (1).

999621323 is an equidigital number, since it uses as much as digits as its factorization.

999621323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 157464, while the sum is 44.

The square root of 999621323 is about 31616.7886256653. The cubic root of 999621323 is about 999.8737583971.

The spelling of 999621323 in words is "nine hundred ninety-nine million, six hundred twenty-one thousand, three hundred twenty-three".