138900067 has 4 divisors (see below), whose sum is σ = 139025536. Its totient is φ = 138774600.

The previous prime is 138900043. The next prime is 138900071. The reversal of 138900067 is 760009831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138900067 is a prime.

It is a super-2 number, since 2×138900067² = 38586457225208978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138900007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61059 + ... + 63292.

It is an arithmetic number, because the mean of its divisors is an integer number (34756384).

Almost surely, 2^138900067 is an apocalyptic number.

138900067 is a deficient number, since it is larger than the sum of its proper divisors (125469).

138900067 is a wasteful number, since it uses less digits than its factorization.

138900067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125468.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 138900067 is about 11785.5872573241. The cubic root of 138900067 is about 517.8859771490.

Adding to 138900067 its reverse (760009831), we get a palindrome (898909898).

The spelling of 138900067 in words is "one hundred thirty-eight million, nine hundred thousand, sixty-seven".