8789999513 has 2 divisors, whose sum is σ = 8789999514. Its totient is φ = 8789999512.

The previous prime is 8789999489. The next prime is 8789999521. The reversal of 8789999513 is 3159999878.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6870420544 + 1919578969 = 82888^2 + 43813^2 .

It is a cyclic number.

It is not a de Polignac number, because 8789999513 - 2²² = 8785805209 is a prime.

It is not a weakly prime, because it can be changed into another prime (8789999593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4394999756 + 4394999757.

It is an arithmetic number, because the mean of its divisors is an integer number (4394999757).

Almost surely, 2^8789999513 is an apocalyptic number.

It is an amenable number.

8789999513 is a deficient number, since it is larger than the sum of its proper divisors (1).

8789999513 is an equidigital number, since it uses as much as digits as its factorization.

8789999513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44089920, while the sum is 68.

The square root of 8789999513 is about 93754.9972694789. The cubic root of 8789999513 is about 2063.7778659977. Note that the first 3 decimals are identical.

The spelling of 8789999513 in words is "eight billion, seven hundred eighty-nine million, nine hundred ninety-nine thousand, five hundred thirteen".