1868443829 has 4 divisors (see below), whose sum is σ = 2135364384. Its totient is φ = 1601523276.

The previous prime is 1868443823. The next prime is 1868443853. The reversal of 1868443829 is 9283448681.

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.

It is a cyclic number.

It is not a de Polignac number, because 1868443829 - 2²⁴ = 1851666613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1868443823) 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, 133460267 + ... + 133460280.

It is an arithmetic number, because the mean of its divisors is an integer number (533841096).

Almost surely, 2^1868443829 is an apocalyptic number.

It is an amenable number.

1868443829 is a deficient number, since it is larger than the sum of its proper divisors (266920555).

1868443829 is an equidigital number, since it uses as much as digits as its factorization.

1868443829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266920554.

The product of its digits is 2654208, while the sum is 53.

The square root of 1868443829 is about 43225.4997541960. The cubic root of 1868443829 is about 1231.6671224711.

The spelling of 1868443829 in words is "one billion, eight hundred sixty-eight million, four hundred forty-three thousand, eight hundred twenty-nine".