999999987701 has 32 divisors (see below), whose sum is σ = 1200836786688. Its totient is φ = 820611325440.

The previous prime is 999999987667. The next prime is 999999987761. The reversal of 999999987701 is 107789999999.

It is a cyclic number.

It is not a de Polignac number, because 999999987701 - 2¹⁰ = 999999986677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999999987761) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7955795 + ... + 8080511.

It is an arithmetic number, because the mean of its divisors is an integer number (37526149584).

Almost surely, 2^999999987701 is an apocalyptic number.

It is an amenable number.

999999987701 is a deficient number, since it is larger than the sum of its proper divisors (200836798987).

999999987701 is a wasteful number, since it uses less digits than its factorization.

999999987701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125981.

The product of its (nonzero) digits is 1874923848, while the sum is 86.

The spelling of 999999987701 in words is "nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred eighty-seven thousand, seven hundred one".