7880981 has 4 divisors (see below), whose sum is σ = 7893600. Its totient is φ = 7868364.

The previous prime is 7880969. The next prime is 7880989. The reversal of 7880981 is 1890887.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1890887 = 29 ⋅65203.

It is a cyclic number.

It is not a de Polignac number, because 7880981 - 2²² = 3686677 is a prime.

It is a super-2 number, since 2×7880981² = 124219723044722, 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 (7880989) 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, 5321 + ... + 6638.

It is an arithmetic number, because the mean of its divisors is an integer number (1973400).

Almost surely, 2^7880981 is an apocalyptic number.

It is an amenable number.

7880981 is a deficient number, since it is larger than the sum of its proper divisors (12619).

7880981 is a wasteful number, since it uses less digits than its factorization.

7880981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12618.

The product of its (nonzero) digits is 32256, while the sum is 41.

The square root of 7880981 is about 2807.3084974758. The cubic root of 7880981 is about 199.0032153551.

The spelling of 7880981 in words is "seven million, eight hundred eighty thousand, nine hundred eighty-one".