999696644 has 6 divisors (see below), whose sum is σ = 1749469134. Its totient is φ = 499848320.

The previous prime is 999696641. The next prime is 999696667. The reversal of 999696644 is 446696999.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 970945600 + 28751044 = 31160^2 + 5362^2 .

It is not an unprimeable number, because it can be changed into a prime (999696641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124962077 + ... + 124962084.

It is an arithmetic number, because the mean of its divisors is an integer number (291578189).

Almost surely, 2^999696644 is an apocalyptic number.

It is an amenable number.

999696644 is a deficient number, since it is larger than the sum of its proper divisors (749772490).

999696644 is a wasteful number, since it uses less digits than its factorization.

999696644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249924165 (or 249924163 counting only the distinct ones).

The product of its digits is 22674816, while the sum is 62.

The square root of 999696644 is about 31617.9797583590. The cubic root of 999696644 is about 999.8988711066.

The spelling of 999696644 in words is "nine hundred ninety-nine million, six hundred ninety-six thousand, six hundred forty-four".