999717552 has 120 divisors (see below), whose sum is σ = 2913303120. Its totient is φ = 331879680.

The previous prime is 999717527. The next prime is 999717571. The reversal of 999717552 is 255717999.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1512102 + ... + 1512762.

It is an arithmetic number, because the mean of its divisors is an integer number (24277526).

Almost surely, 2^999717552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999717552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1456651560).

999717552 is an abundant number, since it is smaller than the sum of its proper divisors (1913585568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999717552 is a wasteful number, since it uses less digits than its factorization.

999717552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073 (or 1055 counting only the distinct ones).

The product of its digits is 1786050, while the sum is 54.

The square root of 999717552 is about 31618.3103912907. The cubic root of 999717552 is about 999.9058418012.

The spelling of 999717552 in words is "nine hundred ninety-nine million, seven hundred seventeen thousand, five hundred fifty-two".