1873139 has 4 divisors (see below), whose sum is σ = 1937760. Its totient is φ = 1808520.

The previous prime is 1873133. The next prime is 1873141. The reversal of 1873139 is 9313781.

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 1873139 - 2²⁰ = 824563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1873133) 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, 32267 + ... + 32324.

It is an arithmetic number, because the mean of its divisors is an integer number (484440).

2^1873139 is an apocalyptic number.

1873139 is a deficient number, since it is larger than the sum of its proper divisors (64621).

1873139 is an equidigital number, since it uses as much as digits as its factorization.

1873139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64620.

The product of its digits is 4536, while the sum is 32.

The square root of 1873139 is about 1368.6266839427. The cubic root of 1873139 is about 123.2697935836.

The spelling of 1873139 in words is "one million, eight hundred seventy-three thousand, one hundred thirty-nine".