139172444 has 6 divisors (see below), whose sum is σ = 243551784. Its totient is φ = 69586220.

The previous prime is 139172443. The next prime is 139172447. The reversal of 139172444 is 444271931.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139172443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17396552 + ... + 17396559.

It is an arithmetic number, because the mean of its divisors is an integer number (40591964).

Almost surely, 2^139172444 is an apocalyptic number.

It is an amenable number.

139172444 is a deficient number, since it is larger than the sum of its proper divisors (104379340).

139172444 is a wasteful number, since it uses less digits than its factorization.

139172444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34793115 (or 34793113 counting only the distinct ones).

The product of its digits is 24192, while the sum is 35.

The square root of 139172444 is about 11797.1371103332. The cubic root of 139172444 is about 518.2242734216.

It can be divided in two parts, 13917 and 2444, that added together give a palindrome (16361).

The spelling of 139172444 in words is "one hundred thirty-nine million, one hundred seventy-two thousand, four hundred forty-four".