139719889 has 4 divisors (see below), whose sum is σ = 147938724. Its totient is φ = 131501056.

The previous prime is 139719869. The next prime is 139719911. The reversal of 139719889 is 988917931.

139719889 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 an emirpimes, since its reverse is a distinct semiprime: 988917931 = 17 ⋅58171643.

It can be written as a sum of positive squares in 2 ways, for example, as 105987025 + 33732864 = 10295^2 + 5808^2 .

It is a cyclic number.

It is not a de Polignac number, because 139719889 - 2⁷ = 139719761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139719869) 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, 4109392 + ... + 4109425.

It is an arithmetic number, because the mean of its divisors is an integer number (36984681).

Almost surely, 2^139719889 is an apocalyptic number.

It is an amenable number.

139719889 is a deficient number, since it is larger than the sum of its proper divisors (8218835).

139719889 is an equidigital number, since it uses as much as digits as its factorization.

139719889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8218834.

The product of its digits is 979776, while the sum is 55.

The square root of 139719889 is about 11820.3167893251. The cubic root of 139719889 is about 518.9028754639.

It can be divided in two parts, 139719 and 889, that added together give a cube (140608 = 52³).

The spelling of 139719889 in words is "one hundred thirty-nine million, seven hundred nineteen thousand, eight hundred eighty-nine".