999773968 has 30 divisors (see below), whose sum is σ = 1950526634. Its totient is φ = 496422912.

The previous prime is 999773923. The next prime is 999773969. The reversal of 999773968 is 869377999.

It can be written as a sum of positive squares in 3 ways, for example, as 12054784 + 987719184 = 3472^2 + 31428^2 .

It is not an unprimeable number, because it can be changed into a prime (999773969) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1756788 + ... + 1757356.

Almost surely, 2^999773968 is an apocalyptic number.

It is an amenable number.

999773968 is a deficient number, since it is larger than the sum of its proper divisors (950752666).

999773968 is an equidigital number, since it uses as much as digits as its factorization.

999773968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339 (or 764 counting only the distinct ones).

The product of its digits is 46294416, while the sum is 67.

The square root of 999773968 is about 31619.2025199878. The cubic root of 999773968 is about 999.9246503226.

The spelling of 999773968 in words is "nine hundred ninety-nine million, seven hundred seventy-three thousand, nine hundred sixty-eight".