1868997443 has 4 divisors (see below), whose sum is σ = 1881541200. Its totient is φ = 1856453688.

The previous prime is 1868997433. The next prime is 1868997461. The reversal of 1868997443 is 3447998681.

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 1868997443 - 2¹⁸ = 1868735299 is a prime.

It is a super-3 number, since 3×1868997443³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1868997413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6271655 + ... + 6271952.

It is an arithmetic number, because the mean of its divisors is an integer number (470385300).

Almost surely, 2^1868997443 is an apocalyptic number.

1868997443 is a deficient number, since it is larger than the sum of its proper divisors (12543757).

1868997443 is a wasteful number, since it uses less digits than its factorization.

1868997443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12543756.

The product of its digits is 10450944, while the sum is 59.

The square root of 1868997443 is about 43231.9030693769. The cubic root of 1868997443 is about 1231.7887568168.

The spelling of 1868997443 in words is "one billion, eight hundred sixty-eight million, nine hundred ninety-seven thousand, four hundred forty-three".