139139719 has 8 divisors (see below), whose sum is σ = 147570912. Its totient is φ = 130907040.

The previous prime is 139139711. The next prime is 139139729. The reversal of 139139719 is 917931931.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 139139719 - 2³ = 139139711 is a prime.

It is a super-2 number, since 2×139139719² = 38719722806797922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139139711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48184 + ... + 50989.

It is an arithmetic number, because the mean of its divisors is an integer number (18446364).

Almost surely, 2^139139719 is an apocalyptic number.

139139719 is a deficient number, since it is larger than the sum of its proper divisors (8431193).

139139719 is an equidigital number, since it uses as much as digits as its factorization.

139139719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99257.

The product of its digits is 45927, while the sum is 43.

The square root of 139139719 is about 11795.7500397389. The cubic root of 139139719 is about 518.1836518295.

It can be divided in two parts, 13913 and 9719, that added together give a palindrome (23632).

The spelling of 139139719 in words is "one hundred thirty-nine million, one hundred thirty-nine thousand, seven hundred nineteen".