6900840985 has 8 divisors (see below), whose sum is σ = 8282939400. Its totient is φ = 5519385984.

The previous prime is 6900840977. The next prime is 6900841039. The reversal of 6900840985 is 5890480096.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 487393929 + 6413447056 = 22077^2 + 80084^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 6900840985 - 2³ = 6900840977 is a prime.

It is an unprimeable number.

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, 136932 + ... + 180421.

It is an arithmetic number, because the mean of its divisors is an integer number (1035367425).

Almost surely, 2^6900840985 is an apocalyptic number.

It is an amenable number.

6900840985 is a deficient number, since it is larger than the sum of its proper divisors (1382098415).

6900840985 is a wasteful number, since it uses less digits than its factorization.

6900840985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321707.

The product of its (nonzero) digits is 622080, while the sum is 49.

The square root of 6900840985 is about 83071.3006097774. The cubic root of 6900840985 is about 1903.8556041816.

The spelling of 6900840985 in words is "six billion, nine hundred million, eight hundred forty thousand, nine hundred eighty-five".