999764222 has 8 divisors (see below), whose sum is σ = 1500010272. Its totient is φ = 499760800.

The previous prime is 999764219. The next prime is 999764231. The reversal of 999764222 is 222467999.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49979 + ... + 67062.

It is an arithmetic number, because the mean of its divisors is an integer number (187501284).

Almost surely, 2^999764222 is an apocalyptic number.

999764222 is a deficient number, since it is larger than the sum of its proper divisors (500246050).

999764222 is a wasteful number, since it uses less digits than its factorization.

999764222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121314.

The product of its digits is 979776, while the sum is 50.

The square root of 999764222 is about 31619.0484044033. The cubic root of 999764222 is about 999.9214011557.

The spelling of 999764222 in words is "nine hundred ninety-nine million, seven hundred sixty-four thousand, two hundred twenty-two".