138761585 has 8 divisors (see below), whose sum is σ = 167178816. Its totient is φ = 110566000.

The previous prime is 138761561. The next prime is 138761587. The reversal of 138761585 is 585167831.

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

It is not a de Polignac number, because 138761585 - 2⁶ = 138761521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138761587) 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, 54029 + ... + 56538.

It is an arithmetic number, because the mean of its divisors is an integer number (20897352).

Almost surely, 2^138761585 is an apocalyptic number.

It is an amenable number.

138761585 is a deficient number, since it is larger than the sum of its proper divisors (28417231).

138761585 is a wasteful number, since it uses less digits than its factorization.

138761585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110823.

The product of its digits is 201600, while the sum is 44.

The square root of 138761585 is about 11779.7107349884. The cubic root of 138761585 is about 517.7138108459.

The spelling of 138761585 in words is "one hundred thirty-eight million, seven hundred sixty-one thousand, five hundred eighty-five".