139209585 has 16 divisors (see below), whose sum is σ = 226061376. Its totient is φ = 73136448.

The previous prime is 139209569. The next prime is 139209607. The reversal of 139209585 is 585902931.

It is not a de Polignac number, because 139209585 - 2⁴ = 139209569 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68254 + ... + 70263.

It is an arithmetic number, because the mean of its divisors is an integer number (14128836).

Almost surely, 2^139209585 is an apocalyptic number.

139209585 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139209585 is a deficient number, since it is larger than the sum of its proper divisors (86851791).

139209585 is a wasteful number, since it uses less digits than its factorization.

139209585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138592.

The product of its (nonzero) digits is 97200, while the sum is 42.

The square root of 139209585 is about 11798.7111584274. The cubic root of 139209585 is about 518.2703688872.

The spelling of 139209585 in words is "one hundred thirty-nine million, two hundred nine thousand, five hundred eighty-five".