999981695 has 16 divisors (see below), whose sum is σ = 1254543552. Its totient is φ = 763741440.

The previous prime is 999981659. The next prime is 999981713. The reversal of 999981695 is 596189999.

It is not a de Polignac number, because 999981695 - 2²⁸ = 731546239 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 54179 + ... + 70251.

It is an arithmetic number, because the mean of its divisors is an integer number (78408972).

Almost surely, 2^999981695 is an apocalyptic number.

999981695 is a deficient number, since it is larger than the sum of its proper divisors (254561857).

999981695 is a wasteful number, since it uses less digits than its factorization.

999981695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16642.

The product of its digits is 14171760, while the sum is 65.

The square root of 999981695 is about 31622.4871728964. The cubic root of 999981695 is about 999.9938982961.

The spelling of 999981695 in words is "nine hundred ninety-nine million, nine hundred eighty-one thousand, six hundred ninety-five".