699916985 has 8 divisors (see below), whose sum is σ = 842394696. Its totient is φ = 558270720.

The previous prime is 699916981. The next prime is 699916991. The reversal of 699916985 is 589619996.

It can be written as a sum of positive squares in 4 ways, for example, as 17505856 + 682411129 = 4184^2 + 26123^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 699916985 - 2² = 699916981 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (699916981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206006 + ... + 209375.

It is an arithmetic number, because the mean of its divisors is an integer number (105299337).

Almost surely, 2^699916985 is an apocalyptic number.

It is an amenable number.

699916985 is a deficient number, since it is larger than the sum of its proper divisors (142477711).

699916985 is a wasteful number, since it uses less digits than its factorization.

699916985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415723.

The product of its digits is 9447840, while the sum is 62.

The square root of 699916985 is about 26455.9442280936. The cubic root of 699916985 is about 887.8689006642.

The spelling of 699916985 in words is "six hundred ninety-nine million, nine hundred sixteen thousand, nine hundred eighty-five".