139318489 has 4 divisors (see below), whose sum is σ = 140241280. Its totient is φ = 138395700.

The previous prime is 139318463. The next prime is 139318493. The reversal of 139318489 is 984813931.

It is a happy number.

139318489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 139318489 - 2²³ = 130929881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139318499) 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, 461169 + ... + 461470.

It is an arithmetic number, because the mean of its divisors is an integer number (35060320).

Almost surely, 2^139318489 is an apocalyptic number.

It is an amenable number.

139318489 is a deficient number, since it is larger than the sum of its proper divisors (922791).

139318489 is an equidigital number, since it uses as much as digits as its factorization.

139318489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922790.

The product of its digits is 186624, while the sum is 46.

The square root of 139318489 is about 11803.3253365312. The cubic root of 139318489 is about 518.4054817208.

The spelling of 139318489 in words is "one hundred thirty-nine million, three hundred eighteen thousand, four hundred eighty-nine".