1868868169 has 4 divisors (see below), whose sum is σ = 2135849344. Its totient is φ = 1601886996.

The previous prime is 1868868167. The next prime is 1868868179. The reversal of 1868868169 is 9618688681.

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 1868868169 - 2¹ = 1868868167 is a prime.

It is a super-2 number, since 2×1868868169² = 6985336466202825122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1868868167) 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, 133490577 + ... + 133490590.

It is an arithmetic number, because the mean of its divisors is an integer number (533962336).

Almost surely, 2^1868868169 is an apocalyptic number.

It is an amenable number.

1868868169 is a deficient number, since it is larger than the sum of its proper divisors (266981175).

1868868169 is an equidigital number, since it uses as much as digits as its factorization.

1868868169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266981174.

The product of its digits is 7962624, while the sum is 61.

The square root of 1868868169 is about 43230.4079208143. The cubic root of 1868868169 is about 1231.7603562195.

The spelling of 1868868169 in words is "one billion, eight hundred sixty-eight million, eight hundred sixty-eight thousand, one hundred sixty-nine".