139209841 has 8 divisors (see below), whose sum is σ = 142347744. Its totient is φ = 136106880.

The previous prime is 139209839. The next prime is 139209857. The reversal of 139209841 is 148902931.

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

It is a cyclic number.

It is not a de Polignac number, because 139209841 - 2¹ = 139209839 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 139209841.

It is not an unprimeable number, because it can be changed into a prime (139209881) 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, 595 + ... + 16696.

It is an arithmetic number, because the mean of its divisors is an integer number (17793468).

Almost surely, 2^139209841 is an apocalyptic number.

It is an amenable number.

139209841 is a deficient number, since it is larger than the sum of its proper divisors (3137903).

139209841 is an equidigital number, since it uses as much as digits as its factorization.

139209841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17471.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 139209841 is about 11798.7220070650. The cubic root of 139209841 is about 518.2706865788.

The spelling of 139209841 in words is "one hundred thirty-nine million, two hundred nine thousand, eight hundred forty-one".