2039881 has 4 divisors (see below), whose sum is σ = 2159892. Its totient is φ = 1919872.

The previous prime is 2039879. The next prime is 2039899. The reversal of 2039881 is 1889302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1889302 = 2 ⋅944651.

It can be written as a sum of positive squares in 2 ways, for example, as 810000 + 1229881 = 900^2 + 1109^2 .

It is a cyclic number.

It is not a de Polignac number, because 2039881 - 2¹ = 2039879 is a prime.

It is a super-2 number, since 2×2039881² = 8322228988322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2039981) 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, 59980 + ... + 60013.

It is an arithmetic number, because the mean of its divisors is an integer number (539973).

2^2039881 is an apocalyptic number.

It is an amenable number.

2039881 is a deficient number, since it is larger than the sum of its proper divisors (120011).

2039881 is a wasteful number, since it uses less digits than its factorization.

2039881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120010.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 2039881 is about 1428.2440267685. The cubic root of 2039881 is about 126.8240479886.

The spelling of 2039881 in words is "two million, thirty-nine thousand, eight hundred eighty-one".