138895207 has 4 divisors (see below), whose sum is σ = 151522056. Its totient is φ = 126268360.

The previous prime is 138895189. The next prime is 138895217. The reversal of 138895207 is 702598831.

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

It is a cyclic number.

It is not a de Polignac number, because 138895207 - 2²³ = 130506599 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 (138895217) 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, 6313408 + ... + 6313429.

It is an arithmetic number, because the mean of its divisors is an integer number (37880514).

Almost surely, 2^138895207 is an apocalyptic number.

138895207 is a deficient number, since it is larger than the sum of its proper divisors (12626849).

138895207 is a wasteful number, since it uses less digits than its factorization.

138895207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12626848.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 138895207 is about 11785.3810714800. The cubic root of 138895207 is about 517.8799369427.

The spelling of 138895207 in words is "one hundred thirty-eight million, eight hundred ninety-five thousand, two hundred seven".