999959538 has 16 divisors (see below), whose sum is σ = 2000559456. Its totient is φ = 333213120.

The previous prime is 999959507. The next prime is 999959557. The reversal of 999959538 is 835959999.

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, 5031 + ... + 45002.

It is an arithmetic number, because the mean of its divisors is an integer number (125034966).

Almost surely, 2^999959538 is an apocalyptic number.

999959538 is an abundant number, since it is smaller than the sum of its proper divisors (1000599918).

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

999959538 is a wasteful number, since it uses less digits than its factorization.

999959538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53369.

The product of its digits is 35429400, while the sum is 66.

The square root of 999959538 is about 31622.1368348187. The cubic root of 999959538 is about 999.9865124848.

The spelling of 999959538 in words is "nine hundred ninety-nine million, nine hundred fifty-nine thousand, five hundred thirty-eight".