239264139 has 4 divisors (see below), whose sum is σ = 319018856. Its totient is φ = 159509424.

The previous prime is 239264119. The next prime is 239264141. The reversal of 239264139 is 931462932.

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

It is not a de Polignac number, because 239264139 - 2⁸ = 239263883 is a prime.

It is a super-2 number, since 2×239264139² = 114494656422822642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 239264097 and 239264106.

It is not an unprimeable number, because it can be changed into a prime (239264119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39877354 + ... + 39877359.

It is an arithmetic number, because the mean of its divisors is an integer number (79754714).

Almost surely, 2^239264139 is an apocalyptic number.

239264139 is a deficient number, since it is larger than the sum of its proper divisors (79754717).

239264139 is an equidigital number, since it uses as much as digits as its factorization.

239264139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79754716.

The product of its digits is 69984, while the sum is 39.

The square root of 239264139 is about 15468.1653404662. The cubic root of 239264139 is about 620.8107145051.

The spelling of 239264139 in words is "two hundred thirty-nine million, two hundred sixty-four thousand, one hundred thirty-nine".