7967881 has 4 divisors (see below), whose sum is σ = 8098564. Its totient is φ = 7837200.

The previous prime is 7967879. The next prime is 7967893. The reversal of 7967881 is 1887697.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 99856 + 7868025 = 316^2 + 2805^2 .

It is a cyclic number.

It is not a de Polignac number, because 7967881 - 2¹ = 7967879 is a prime.

It is a super-2 number, since 2×7967881² = 126974255260322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7967831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65250 + ... + 65371.

It is an arithmetic number, because the mean of its divisors is an integer number (2024641).

Almost surely, 2^7967881 is an apocalyptic number.

It is an amenable number.

7967881 is a deficient number, since it is larger than the sum of its proper divisors (130683).

7967881 is a wasteful number, since it uses less digits than its factorization.

7967881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130682.

The product of its digits is 169344, while the sum is 46.

The square root of 7967881 is about 2822.7435235954. The cubic root of 7967881 is about 199.7319826606.

The spelling of 7967881 in words is "seven million, nine hundred sixty-seven thousand, eight hundred eighty-one".