139691589 has 8 divisors (see below), whose sum is σ = 186699552. Its totient is φ = 92905680.

The previous prime is 139691569. The next prime is 139691593. The reversal of 139691589 is 985196931.

It is a happy number.

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

It is not a de Polignac number, because 139691589 - 2¹⁷ = 139560517 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139691509) 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 7 ways as a sum of consecutive naturals, for example, 54039 + ... + 56564.

It is an arithmetic number, because the mean of its divisors is an integer number (23337444).

Almost surely, 2^139691589 is an apocalyptic number.

It is an amenable number.

139691589 is a deficient number, since it is larger than the sum of its proper divisors (47007963).

139691589 is a wasteful number, since it uses less digits than its factorization.

139691589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111027.

The product of its digits is 524880, while the sum is 51.

The square root of 139691589 is about 11819.1196372657. The cubic root of 139691589 is about 518.8678388320.

The spelling of 139691589 in words is "one hundred thirty-nine million, six hundred ninety-one thousand, five hundred eighty-nine".