999899572 has 24 divisors (see below), whose sum is σ = 2000630016. Its totient is φ = 428350368.

The previous prime is 999899561. The next prime is 999899587. The reversal of 999899572 is 275998999.

999899572 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 999899498 and 999899507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78738 + ... + 90550.

It is an arithmetic number, because the mean of its divisors is an integer number (83359584).

Almost surely, 2^999899572 is an apocalyptic number.

It is an amenable number.

999899572 is an abundant number, since it is smaller than the sum of its proper divisors (1000730444).

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

999899572 is a wasteful number, since it uses less digits than its factorization.

999899572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14847 (or 14845 counting only the distinct ones).

The product of its digits is 33067440, while the sum is 67.

The square root of 999899572 is about 31621.1886557100. The cubic root of 999899572 is about 999.9665228793.

It can be divided in two parts, 99989 and 9572, that added together give a square (109561 = 331²).

The spelling of 999899572 in words is "nine hundred ninety-nine million, eight hundred ninety-nine thousand, five hundred seventy-two".