8138690039 has 2 divisors, whose sum is σ = 8138690040. Its totient is φ = 8138690038.

The previous prime is 8138690009. The next prime is 8138690051. The reversal of 8138690039 is 9300968318.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8138690039 is a prime.

It is a super-3 number, since 3×8138690039³ (a number of 31 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8138689975 and 8138690002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8138690009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4069345019 + 4069345020.

It is an arithmetic number, because the mean of its divisors is an integer number (4069345020).

Almost surely, 2^8138690039 is an apocalyptic number.

8138690039 is a deficient number, since it is larger than the sum of its proper divisors (1).

8138690039 is an equidigital number, since it uses as much as digits as its factorization.

8138690039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 8138690039 is about 90214.6885989194. The cubic root of 8138690039 is about 2011.4913512197.

The spelling of 8138690039 in words is "eight billion, one hundred thirty-eight million, six hundred ninety thousand, thirty-nine".