139506506 has 8 divisors (see below), whose sum is σ = 209599680. Its totient is φ = 69639948.

The previous prime is 139506487. The next prime is 139506517. The reversal of 139506506 is 605605931.

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 55106 + ... + 57581.

It is an arithmetic number, because the mean of its divisors is an integer number (26199960).

Almost surely, 2^139506506 is an apocalyptic number.

139506506 is a deficient number, since it is larger than the sum of its proper divisors (70093174).

139506506 is a wasteful number, since it uses less digits than its factorization.

139506506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113308.

The product of its (nonzero) digits is 24300, while the sum is 35.

The square root of 139506506 is about 11811.2872287486. The cubic root of 139506506 is about 518.6385812675.

The spelling of 139506506 in words is "one hundred thirty-nine million, five hundred six thousand, five hundred six".