1869125243 has 4 divisors (see below), whose sum is σ = 1874332080. Its totient is φ = 1863918408.

The previous prime is 1869125233. The next prime is 1869125257. The reversal of 1869125243 is 3425219681.

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 1869125243 - 2¹⁰ = 1869124219 is a prime.

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 1869125243.

It is not an unprimeable number, because it can be changed into a prime (1869125233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2602880 + ... + 2603597.

It is an arithmetic number, because the mean of its divisors is an integer number (468583020).

Almost surely, 2^1869125243 is an apocalyptic number.

1869125243 is a deficient number, since it is larger than the sum of its proper divisors (5206837).

1869125243 is an equidigital number, since it uses as much as digits as its factorization.

1869125243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5206836.

The product of its digits is 103680, while the sum is 41.

The square root of 1869125243 is about 43233.3811192231. The cubic root of 1869125243 is about 1231.8168322994.

It can be divided in two parts, 18691 and 25243, that added together give a palindrome (43934).

The spelling of 1869125243 in words is "one billion, eight hundred sixty-nine million, one hundred twenty-five thousand, two hundred forty-three".