139033439 has 4 divisors (see below), whose sum is σ = 139090656. Its totient is φ = 138976224.

The previous prime is 139033423. The next prime is 139033487. The reversal of 139033439 is 934330931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 139033439 - 2⁴ = 139033423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139033399 and 139033408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139033409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24794 + ... + 29879.

It is an arithmetic number, because the mean of its divisors is an integer number (34772664).

Almost surely, 2^139033439 is an apocalyptic number.

139033439 is a deficient number, since it is larger than the sum of its proper divisors (57217).

139033439 is an equidigital number, since it uses as much as digits as its factorization.

139033439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57216.

The product of its (nonzero) digits is 26244, while the sum is 35.

The square root of 139033439 is about 11791.2441667536. The cubic root of 139033439 is about 518.0516823554.

The spelling of 139033439 in words is "one hundred thirty-nine million, thirty-three thousand, four hundred thirty-nine".