999987742 has 16 divisors (see below), whose sum is σ = 1615959072. Its totient is φ = 461363040.

The previous prime is 999987697. The next prime is 999987743. The reversal of 999987742 is 247789999.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999987743) 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 in 7 ways as a sum of consecutive naturals, for example, 90208 + ... + 100684.

It is an arithmetic number, because the mean of its divisors is an integer number (100997442).

Almost surely, 2^999987742 is an apocalyptic number.

999987742 is a deficient number, since it is larger than the sum of its proper divisors (615971330).

999987742 is a wasteful number, since it uses less digits than its factorization.

999987742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14163.

The product of its digits is 20575296, while the sum is 64.

The square root of 999987742 is about 31622.5827850920. The cubic root of 999987742 is about 999.9959139833.

The spelling of 999987742 in words is "nine hundred ninety-nine million, nine hundred eighty-seven thousand, seven hundred forty-two".