1881879 has 4 divisors (see below), whose sum is σ = 2509176. Its totient is φ = 1254584.

The previous prime is 1881863. The next prime is 1881881. The reversal of 1881879 is 9781881.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1881879 - 2⁴ = 1881863 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 1881879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1881889) 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 3 ways as a sum of consecutive naturals, for example, 313644 + ... + 313649.

It is an arithmetic number, because the mean of its divisors is an integer number (627294).

2^1881879 is an apocalyptic number.

1881879 is a deficient number, since it is larger than the sum of its proper divisors (627297).

1881879 is an equidigital number, since it uses as much as digits as its factorization.

1881879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627296.

The product of its digits is 32256, while the sum is 42.

The square root of 1881879 is about 1371.8159497542. The cubic root of 1881879 is about 123.4612203200.

The spelling of 1881879 in words is "one million, eight hundred eighty-one thousand, eight hundred seventy-nine".