239139949 has 4 divisors (see below), whose sum is σ = 239317020. Its totient is φ = 238962880.

The previous prime is 239139913. The next prime is 239139961. The reversal of 239139949 is 949931932.

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

It can be written as a sum of positive squares in 2 ways, for example, as 56700900 + 182439049 = 7530^2 + 13507^2 .

It is a cyclic number.

It is not a de Polignac number, because 239139949 - 2¹³ = 239131757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (239139049) 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, 86494 + ... + 89215.

It is an arithmetic number, because the mean of its divisors is an integer number (59829255).

Almost surely, 2^239139949 is an apocalyptic number.

It is an amenable number.

239139949 is a deficient number, since it is larger than the sum of its proper divisors (177071).

239139949 is a wasteful number, since it uses less digits than its factorization.

239139949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177070.

The product of its digits is 472392, while the sum is 49.

The square root of 239139949 is about 15464.1504454658. The cubic root of 239139949 is about 620.7032853599.

The spelling of 239139949 in words is "two hundred thirty-nine million, one hundred thirty-nine thousand, nine hundred forty-nine".