999722356 has 6 divisors (see below), whose sum is σ = 1749514130. Its totient is φ = 499861176.

The previous prime is 999722299. The next prime is 999722357. The reversal of 999722356 is 653227999.

It can be written as a sum of positive squares in only one way, i.e., 891977956 + 107744400 = 29866^2 + 10380^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999722357) 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 as a sum of consecutive naturals, namely, 124965291 + ... + 124965298.

Almost surely, 2^999722356 is an apocalyptic number.

It is an amenable number.

999722356 is a deficient number, since it is larger than the sum of its proper divisors (749791774).

999722356 is a wasteful number, since it uses less digits than its factorization.

999722356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249930593 (or 249930591 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 52.

The square root of 999722356 is about 31618.3863598382. The cubic root of 999722356 is about 999.9074434335.

The spelling of 999722356 in words is "nine hundred ninety-nine million, seven hundred twenty-two thousand, three hundred fifty-six".