1881939 has 8 divisors (see below), whose sum is σ = 2518992. Its totient is φ = 1249760.

The previous prime is 1881937. The next prime is 1881949. The reversal of 1881939 is 9391881.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1881939 - 2¹ = 1881937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1881897 and 1881906.

It is not an unprimeable number, because it can be changed into a prime (1881937) 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 7 ways as a sum of consecutive naturals, for example, 192 + ... + 1949.

It is an arithmetic number, because the mean of its divisors is an integer number (314874).

2^1881939 is an apocalyptic number.

1881939 is a deficient number, since it is larger than the sum of its proper divisors (637053).

1881939 is a wasteful number, since it uses less digits than its factorization.

1881939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2437.

The product of its digits is 15552, while the sum is 39.

The square root of 1881939 is about 1371.8378184027. The cubic root of 1881939 is about 123.4625324119.

The spelling of 1881939 in words is "one million, eight hundred eighty-one thousand, nine hundred thirty-nine".