138704928767 has 4 divisors (see below), whose sum is σ = 138712632576. Its totient is φ = 138697224960.

The previous prime is 138704928707. The next prime is 138704928793. The reversal of 138704928767 is 767829407831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 767829407831 = 23 ⋅33383887297.

It is a cyclic number.

It is not a de Polignac number, because 138704928767 - 2²⁸ = 138436493311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138704928707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3824834 + ... + 3860927.

It is an arithmetic number, because the mean of its divisors is an integer number (34678158144).

Almost surely, 2^138704928767 is an apocalyptic number.

138704928767 is a deficient number, since it is larger than the sum of its proper divisors (7703809).

138704928767 is an equidigital number, since it uses as much as digits as its factorization.

138704928767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7703808.

The product of its (nonzero) digits is 28449792, while the sum is 62.

The spelling of 138704928767 in words is "one hundred thirty-eight billion, seven hundred four million, nine hundred twenty-eight thousand, seven hundred sixty-seven".