7039881 has 6 divisors (see below), whose sum is σ = 10168730. Its totient is φ = 4693248.

The previous prime is 7039873. The next prime is 7039897. The reversal of 7039881 is 1889307.

7039881 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 4064256 + 2975625 = 2016^2 + 1725^2 .

It is not a de Polignac number, because 7039881 - 2³ = 7039873 is a prime.

It is a super-2 number, since 2×7039881² = 99119848988322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7039841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 391096 + ... + 391113.

Almost surely, 2^7039881 is an apocalyptic number.

It is an amenable number.

7039881 is a deficient number, since it is larger than the sum of its proper divisors (3128849).

7039881 is a wasteful number, since it uses less digits than its factorization.

7039881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782215 (or 782212 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 7039881 is about 2653.2774072833. The cubic root of 7039881 is about 191.6557143920.

The spelling of 7039881 in words is "seven million, thirty-nine thousand, eight hundred eighty-one".