8999813749 has 2 divisors, whose sum is σ = 8999813750. Its totient is φ = 8999813748.

The previous prime is 8999813743. The next prime is 8999813759. The reversal of 8999813749 is 9473189998.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8610540849 + 389272900 = 92793^2 + 19730^2 .

It is a cyclic number.

It is not a de Polignac number, because 8999813749 - 2⁵ = 8999813717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8999813743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4499906874 + 4499906875.

It is an arithmetic number, because the mean of its divisors is an integer number (4499906875).

Almost surely, 2^8999813749 is an apocalyptic number.

It is an amenable number.

8999813749 is a deficient number, since it is larger than the sum of its proper divisors (1).

8999813749 is an equidigital number, since it uses as much as digits as its factorization.

8999813749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35271936, while the sum is 67.

The square root of 8999813749 is about 94867.3481710119. The cubic root of 8999813749 is about 2080.0694741495.

The spelling of 8999813749 in words is "eight billion, nine hundred ninety-nine million, eight hundred thirteen thousand, seven hundred forty-nine".