38639986967 has 2 divisors, whose sum is σ = 38639986968. Its totient is φ = 38639986966.

The previous prime is 38639986939. The next prime is 38639986991. The reversal of 38639986967 is 76968993683.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38639986967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 38639986894 and 38639986903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38639986997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19319993483 + 19319993484.

It is an arithmetic number, because the mean of its divisors is an integer number (19319993484).

Almost surely, 2^38639986967 is an apocalyptic number.

38639986967 is a deficient number, since it is larger than the sum of its proper divisors (1).

38639986967 is an equidigital number, since it uses as much as digits as its factorization.

38639986967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 634894848, while the sum is 74.

The spelling of 38639986967 in words is "thirty-eight billion, six hundred thirty-nine million, nine hundred eighty-six thousand, nine hundred sixty-seven".