139352144 has 10 divisors (see below), whose sum is σ = 269994810. Its totient is φ = 69676064.

The previous prime is 139352131. The next prime is 139352149. The reversal of 139352144 is 441253931.

It can be written as a sum of positive squares in only one way, i.e., 137358400 + 1993744 = 11720^2 + 1412^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 139352144.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139352149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4354739 + ... + 4354770.

It is an arithmetic number, because the mean of its divisors is an integer number (26999481).

Almost surely, 2^139352144 is an apocalyptic number.

It is an amenable number.

139352144 is a deficient number, since it is larger than the sum of its proper divisors (130642666).

139352144 is an equidigital number, since it uses as much as digits as its factorization.

139352144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8709517 (or 8709511 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

The square root of 139352144 is about 11804.7509080031. The cubic root of 139352144 is about 518.4472218897.

The spelling of 139352144 in words is "one hundred thirty-nine million, three hundred fifty-two thousand, one hundred forty-four".