144891239 has 2 divisors, whose sum is σ = 144891240. Its totient is φ = 144891238.

The previous prime is 144891217. The next prime is 144891259. The reversal of 144891239 is 932198441.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144891239 is a prime.

It is a super-2 number, since 2×144891239² = 41986942277910242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 144891196 and 144891205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144891259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72445619 + 72445620.

It is an arithmetic number, because the mean of its divisors is an integer number (72445620).

Almost surely, 2^144891239 is an apocalyptic number.

144891239 is a deficient number, since it is larger than the sum of its proper divisors (1).

144891239 is an equidigital number, since it uses as much as digits as its factorization.

144891239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 41.

The square root of 144891239 is about 12037.0776769115. The cubic root of 144891239 is about 525.2274014123.

The spelling of 144891239 in words is "one hundred forty-four million, eight hundred ninety-one thousand, two hundred thirty-nine".