138560407 has 4 divisors (see below), whose sum is σ = 145853080. Its totient is φ = 131267736.

The previous prime is 138560393. The next prime is 138560413. The reversal of 138560407 is 704065831.

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-138560407 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 (138560437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3646308 + ... + 3646345.

It is an arithmetic number, because the mean of its divisors is an integer number (36463270).

Almost surely, 2^138560407 is an apocalyptic number.

138560407 is a deficient number, since it is larger than the sum of its proper divisors (7292673).

138560407 is an equidigital number, since it uses as much as digits as its factorization.

138560407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7292672.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 138560407 is about 11771.1684636658. The cubic root of 138560407 is about 517.4634942003.

The spelling of 138560407 in words is "one hundred thirty-eight million, five hundred sixty thousand, four hundred seven".