139819427 has 4 divisors (see below), whose sum is σ = 152530296. Its totient is φ = 127108560.

The previous prime is 139819403. The next prime is 139819453. The reversal of 139819427 is 724918931.

139819427 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.

It is a cyclic number.

It is not a de Polignac number, because 139819427 - 2¹² = 139815331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139819457) 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, 6355418 + ... + 6355439.

It is an arithmetic number, because the mean of its divisors is an integer number (38132574).

Almost surely, 2^139819427 is an apocalyptic number.

139819427 is a deficient number, since it is larger than the sum of its proper divisors (12710869).

139819427 is a wasteful number, since it uses less digits than its factorization.

139819427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12710868.

The product of its digits is 108864, while the sum is 44.

The square root of 139819427 is about 11824.5265021480. The cubic root of 139819427 is about 519.0260702697.

The spelling of 139819427 in words is "one hundred thirty-nine million, eight hundred nineteen thousand, four hundred twenty-seven".