139943361 has 8 divisors (see below), whose sum is σ = 191634304. Its totient is φ = 90774000.

The previous prime is 139943359. The next prime is 139943383. The reversal of 139943361 is 163349931.

139943361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 139943361 - 2¹ = 139943359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139943311) 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, 630265 + ... + 630486.

It is an arithmetic number, because the mean of its divisors is an integer number (23954288).

Almost surely, 2^139943361 is an apocalyptic number.

It is an amenable number.

139943361 is a deficient number, since it is larger than the sum of its proper divisors (51690943).

139943361 is a wasteful number, since it uses less digits than its factorization.

139943361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260791.

The product of its digits is 52488, while the sum is 39.

The square root of 139943361 is about 11829.7658894840. The cubic root of 139943361 is about 519.1793774844.

The spelling of 139943361 in words is "one hundred thirty-nine million, nine hundred forty-three thousand, three hundred sixty-one".