7885981 has 4 divisors (see below), whose sum is σ = 8078364. Its totient is φ = 7693600.

The previous prime is 7885973. The next prime is 7885993. The reversal of 7885981 is 1895887.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1895887 = 7 ⋅270841.

It can be written as a sum of positive squares in 2 ways, for example, as 235225 + 7650756 = 485^2 + 2766^2 .

It is a cyclic number.

It is not a de Polignac number, because 7885981 - 2³ = 7885973 is a prime.

It is a super-2 number, since 2×7885981² = 124377392664722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7885901) 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, 96130 + ... + 96211.

It is an arithmetic number, because the mean of its divisors is an integer number (2019591).

Almost surely, 2^7885981 is an apocalyptic number.

It is an amenable number.

7885981 is a deficient number, since it is larger than the sum of its proper divisors (192383).

7885981 is a wasteful number, since it uses less digits than its factorization.

7885981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192382.

The product of its digits is 161280, while the sum is 46.

The square root of 7885981 is about 2808.1988889678. The cubic root of 7885981 is about 199.0452915774.

The spelling of 7885981 in words is "seven million, eight hundred eighty-five thousand, nine hundred eighty-one".