139427383 has 4 divisors (see below), whose sum is σ = 139970160. Its totient is φ = 138884608.

The previous prime is 139427381. The next prime is 139427399. The reversal of 139427383 is 383724931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 383724931 = 19 ⋅20196049.

It is a cyclic number.

It is not a de Polignac number, because 139427383 - 2¹ = 139427381 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139427381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271003 + ... + 271516.

It is an arithmetic number, because the mean of its divisors is an integer number (34992540).

Almost surely, 2^139427383 is an apocalyptic number.

139427383 is a deficient number, since it is larger than the sum of its proper divisors (542777).

139427383 is an equidigital number, since it uses as much as digits as its factorization.

139427383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542776.

The product of its digits is 108864, while the sum is 40.

The square root of 139427383 is about 11807.9372881126. The cubic root of 139427383 is about 518.5405117649.

The spelling of 139427383 in words is "one hundred thirty-nine million, four hundred twenty-seven thousand, three hundred eighty-three".