8638975019 has 2 divisors, whose sum is σ = 8638975020. Its totient is φ = 8638975018.

The previous prime is 8638974997. The next prime is 8638975049. The reversal of 8638975019 is 9105798368.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8638975019 is a prime.

It is a super-2 number, since 2×8638975019² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8638975049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4319487509 + 4319487510.

It is an arithmetic number, because the mean of its divisors is an integer number (4319487510).

Almost surely, 2^8638975019 is an apocalyptic number.

8638975019 is a deficient number, since it is larger than the sum of its proper divisors (1).

8638975019 is an equidigital number, since it uses as much as digits as its factorization.

8638975019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3265920, while the sum is 56.

The square root of 8638975019 is about 92946.0866255272. The cubic root of 8638975019 is about 2051.8899896153.

The spelling of 8638975019 in words is "eight billion, six hundred thirty-eight million, nine hundred seventy-five thousand, nineteen".