999959541 has 16 divisors (see below), whose sum is σ = 1524507264. Its totient is φ = 571120704.

The previous prime is 999959507. The next prime is 999959557. The reversal of 999959541 is 145959999.

It is not a de Polignac number, because 999959541 - 2¹⁴ = 999943157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999959561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35715 + ... + 57231.

It is an arithmetic number, because the mean of its divisors is an integer number (95281704).

Almost surely, 2^999959541 is an apocalyptic number.

It is an amenable number.

999959541 is a deficient number, since it is larger than the sum of its proper divisors (524547723).

999959541 is a wasteful number, since it uses less digits than its factorization.

999959541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23740.

The product of its digits is 5904900, while the sum is 60.

The square root of 999959541 is about 31622.1368822539. The cubic root of 999959541 is about 999.9865134848.

The spelling of 999959541 in words is "nine hundred ninety-nine million, nine hundred fifty-nine thousand, five hundred forty-one".