139385071 has 16 divisors (see below), whose sum is σ = 163404864. Its totient is φ = 116423424.

The previous prime is 139385063. The next prime is 139385087. The reversal of 139385071 is 170583931.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 139385071 - 2³ = 139385063 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 139385071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139385011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57051 + ... + 59443.

It is an arithmetic number, because the mean of its divisors is an integer number (10212804).

Almost surely, 2^139385071 is an apocalyptic number.

139385071 is a deficient number, since it is larger than the sum of its proper divisors (24019793).

139385071 is a wasteful number, since it uses less digits than its factorization.

139385071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2610.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 139385071 is about 11806.1454759799. The cubic root of 139385071 is about 518.4880526628.

The spelling of 139385071 in words is "one hundred thirty-nine million, three hundred eighty-five thousand, seventy-one".