999987000042 has 32 divisors (see below), whose sum is σ = 2087031651840. Its totient is φ = 318820811760.

The previous prime is 999987000037. The next prime is 999987000083. The reversal of 999987000042 is 240000789999.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2833317 + ... + 3166647.

It is an arithmetic number, because the mean of its divisors is an integer number (65219739120).

Almost surely, 2^999987000042 is an apocalyptic number.

It is a pronic number, being equal to 999993×999994.

999987000042 is an abundant number, since it is smaller than the sum of its proper divisors (1087044651798).

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

999987000042 is a wasteful number, since it uses less digits than its factorization.

999987000042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355098.

The product of its (nonzero) digits is 2939328, while the sum is 57.

The spelling of 999987000042 in words is "nine hundred ninety-nine billion, nine hundred eighty-seven million, forty-two", and thus it is an aban number.