999332667 has 16 divisors (see below), whose sum is σ = 1520507680. Its totient is φ = 648215136.

The previous prime is 999332617. The next prime is 999332687. The reversal of 999332667 is 766233999.

It is a happy number.

It is not a de Polignac number, because 999332667 - 2²² = 995138363 is a prime.

It is a Duffinian number.

999332667 is a modest number, since divided by 332667 gives 999 as remainder.

It is not an unprimeable number, because it can be changed into a prime (999332617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 499168 + ... + 501165.

It is an arithmetic number, because the mean of its divisors is an integer number (95031730).

Almost surely, 2^999332667 is an apocalyptic number.

999332667 is a deficient number, since it is larger than the sum of its proper divisors (521175013).

999332667 is a wasteful number, since it uses less digits than its factorization.

999332667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000379 (or 1000373 counting only the distinct ones).

The product of its digits is 3306744, while the sum is 54.

The square root of 999332667 is about 31612.2233795727. The cubic root of 999332667 is about 999.7775061668. Note that the first 3 decimals are identical.

It can be divided in two parts, 999332 and 667, that added together give a palindrome (999999).

The spelling of 999332667 in words is "nine hundred ninety-nine million, three hundred thirty-two thousand, six hundred sixty-seven".