7681985 has 8 divisors (see below), whose sum is σ = 9703680. Its totient is φ = 5822064.

The previous prime is 7681969. The next prime is 7681991. The reversal of 7681985 is 5891867.

It is a happy number.

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 7681985 - 2⁴ = 7681969 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40337 + ... + 40526.

It is an arithmetic number, because the mean of its divisors is an integer number (1212960).

Almost surely, 2^7681985 is an apocalyptic number.

It is an amenable number.

7681985 is a deficient number, since it is larger than the sum of its proper divisors (2021695).

7681985 is a wasteful number, since it uses less digits than its factorization.

7681985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80887.

The product of its digits is 120960, while the sum is 44.

The square root of 7681985 is about 2771.6394065607. The cubic root of 7681985 is about 197.3139625064.

The spelling of 7681985 in words is "seven million, six hundred eighty-one thousand, nine hundred eighty-five".