144531239 has 2 divisors, whose sum is σ = 144531240. Its totient is φ = 144531238.

The previous prime is 144531209. The next prime is 144531253. The reversal of 144531239 is 932135441.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144531239 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is equal to p_8153753 and since 144531239 and 8153753 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144531209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72265619 + 72265620.

It is an arithmetic number, because the mean of its divisors is an integer number (72265620).

Almost surely, 2^144531239 is an apocalyptic number.

144531239 is a deficient number, since it is larger than the sum of its proper divisors (1).

144531239 is an equidigital number, since it uses as much as digits as its factorization.

144531239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 32.

The square root of 144531239 is about 12022.1145810544. The cubic root of 144531239 is about 524.7920434124.

The spelling of 144531239 in words is "one hundred forty-four million, five hundred thirty-one thousand, two hundred thirty-nine".