8994891813 has 4 divisors (see below), whose sum is σ = 11993189088. Its totient is φ = 5996594540.

The previous prime is 8994891797. The next prime is 8994891863. The reversal of 8994891813 is 3181984998.

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 8994891813 - 2⁴ = 8994891797 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8994891863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1499148633 + ... + 1499148638.

It is an arithmetic number, because the mean of its divisors is an integer number (2998297272).

Almost surely, 2^8994891813 is an apocalyptic number.

It is an amenable number.

8994891813 is a deficient number, since it is larger than the sum of its proper divisors (2998297275).

8994891813 is a wasteful number, since it uses less digits than its factorization.

8994891813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2998297274.

The product of its digits is 4478976, while the sum is 60.

The square root of 8994891813 is about 94841.4034744320. The cubic root of 8994891813 is about 2079.6902131248.

The spelling of 8994891813 in words is "eight billion, nine hundred ninety-four million, eight hundred ninety-one thousand, eight hundred thirteen".