138696673 has 8 divisors (see below), whose sum is σ = 139833792. Its totient is φ = 137563536.

The previous prime is 138696667. The next prime is 138696689. The reversal of 138696673 is 376696831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138696673 - 2⁵ = 138696641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138696073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145986 + ... + 146932.

It is an arithmetic number, because the mean of its divisors is an integer number (17479224).

Almost surely, 2^138696673 is an apocalyptic number.

It is an amenable number.

138696673 is a deficient number, since it is larger than the sum of its proper divisors (1137119).

138696673 is an equidigital number, since it uses as much as digits as its factorization.

138696673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1991.

The product of its digits is 979776, while the sum is 49.

The square root of 138696673 is about 11776.9551667653. The cubic root of 138696673 is about 517.6330702469.

The spelling of 138696673 in words is "one hundred thirty-eight million, six hundred ninety-six thousand, six hundred seventy-three".