139238719 has 4 divisors (see below), whose sum is σ = 139357800. Its totient is φ = 139119640.

The previous prime is 139238681. The next prime is 139238731. The reversal of 139238719 is 917832931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139238719 is a prime.

It is a super-2 number, since 2×139238719² = 38774841737521922, 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 (139238819) 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, 57769 + ... + 60130.

It is an arithmetic number, because the mean of its divisors is an integer number (34839450).

Almost surely, 2^139238719 is an apocalyptic number.

139238719 is a deficient number, since it is larger than the sum of its proper divisors (119081).

139238719 is a wasteful number, since it uses less digits than its factorization.

139238719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119080.

The product of its digits is 81648, while the sum is 43.

The square root of 139238719 is about 11799.9457202141. The cubic root of 139238719 is about 518.3065211768.

The spelling of 139238719 in words is "one hundred thirty-nine million, two hundred thirty-eight thousand, seven hundred nineteen".