7685881 has 4 divisors (see below), whose sum is σ = 8783872. Its totient is φ = 6587892.

The previous prime is 7685879. The next prime is 7685891. The reversal of 7685881 is 1885867.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7685881 - 2¹ = 7685879 is a prime.

It is a super-2 number, since 2×7685881² = 118145533492322, which contains 22 as substring.

It is a Duffinian number.

7685881 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7685801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 548985 + ... + 548998.

It is an arithmetic number, because the mean of its divisors is an integer number (2195968).

Almost surely, 2^7685881 is an apocalyptic number.

It is an amenable number.

7685881 is a deficient number, since it is larger than the sum of its proper divisors (1097991).

7685881 is a wasteful number, since it uses less digits than its factorization.

7685881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1097990.

The product of its digits is 107520, while the sum is 43.

The square root of 7685881 is about 2772.3421506012. The cubic root of 7685881 is about 197.3473134904.

The spelling of 7685881 in words is "seven million, six hundred eighty-five thousand, eight hundred eighty-one".