144647231 has 2 divisors, whose sum is σ = 144647232. Its totient is φ = 144647230.

The previous prime is 144647177. The next prime is 144647233. The reversal of 144647231 is 132746441.

It is a strong prime.

It is an emirp because it is prime and its reverse (132746441) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144647231 is a prime.

It is a super-2 number, since 2×144647231² = 41845642871934722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 144647233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144647233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72323615 + 72323616.

It is an arithmetic number, because the mean of its divisors is an integer number (72323616).

Almost surely, 2^144647231 is an apocalyptic number.

144647231 is a deficient number, since it is larger than the sum of its proper divisors (1).

144647231 is an equidigital number, since it uses as much as digits as its factorization.

144647231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 32.

The square root of 144647231 is about 12026.9377232943. The cubic root of 144647231 is about 524.9323946205.

The spelling of 144647231 in words is "one hundred forty-four million, six hundred forty-seven thousand, two hundred thirty-one".