207881 has 4 divisors (see below), whose sum is σ = 212352. Its totient is φ = 203412.

The previous prime is 207877. The next prime is 207923. The reversal of 207881 is 188702.

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: 188702 = 2 ⋅94351.

It is a cyclic number.

It is not a de Polignac number, because 207881 - 2² = 207877 is a prime.

It is a super-2 number, since 2×207881² = 86429020322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 207881.

It is not an unprimeable number, because it can be changed into a prime (207811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2165 + ... + 2258.

It is an arithmetic number, because the mean of its divisors is an integer number (53088).

2²⁰⁷⁸⁸¹ is an apocalyptic number.

It is an amenable number.

207881 is a deficient number, since it is larger than the sum of its proper divisors (4471).

207881 is an equidigital number, since it uses as much as digits as its factorization.

207881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4470.

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 207881 is about 455.9396889941. The cubic root of 207881 is about 59.2386199488.

The spelling of 207881 in words is "two hundred seven thousand, eight hundred eighty-one".