7931985 has 8 divisors (see below), whose sum is σ = 12691200. Its totient is φ = 4230384.

The previous prime is 7931977. The next prime is 7932011. The reversal of 7931985 is 5891397.

It is a happy number.

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

It is not a de Polignac number, because 7931985 - 2³ = 7931977 is a prime.

7931985 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264385 + ... + 264414.

It is an arithmetic number, because the mean of its divisors is an integer number (1586400).

Almost surely, 2^7931985 is an apocalyptic number.

It is an amenable number.

7931985 is a deficient number, since it is larger than the sum of its proper divisors (4759215).

7931985 is a wasteful number, since it uses less digits than its factorization.

7931985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528807.

The product of its digits is 68040, while the sum is 42.

The square root of 7931985 is about 2816.3779930968. The cubic root of 7931985 is about 199.4315944393.

The spelling of 7931985 in words is "seven million, nine hundred thirty-one thousand, nine hundred eighty-five".