139734785 has 8 divisors (see below), whose sum is σ = 167783616. Its totient is φ = 111719920.

The previous prime is 139734779. The next prime is 139734787. The reversal of 139734785 is 587437931.

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

It is not a de Polignac number, because 139734785 - 2²⁰ = 138686209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139734787) 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, 1670 + ... + 16800.

It is an arithmetic number, because the mean of its divisors is an integer number (20972952).

Almost surely, 2^139734785 is an apocalyptic number.

It is an amenable number.

139734785 is a deficient number, since it is larger than the sum of its proper divisors (28048831).

139734785 is a wasteful number, since it uses less digits than its factorization.

139734785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16983.

The product of its digits is 635040, while the sum is 47.

The square root of 139734785 is about 11820.9468740875. The cubic root of 139734785 is about 518.9213154598.

The spelling of 139734785 in words is "one hundred thirty-nine million, seven hundred thirty-four thousand, seven hundred eighty-five".