144393857 has 2 divisors, whose sum is σ = 144393858. Its totient is φ = 144393856.

The previous prime is 144393829. The next prime is 144393859. The reversal of 144393857 is 758393441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99181681 + 45212176 = 9959^2 + 6724^2 .

It is a cyclic number.

It is not a de Polignac number, because 144393857 - 2¹² = 144389761 is a prime.

Together with 144393859, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (144393859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72196928 + 72196929.

It is an arithmetic number, because the mean of its divisors is an integer number (72196929).

Almost surely, 2^144393857 is an apocalyptic number.

It is an amenable number.

144393857 is a deficient number, since it is larger than the sum of its proper divisors (1).

144393857 is an equidigital number, since it uses as much as digits as its factorization.

144393857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 44.

The square root of 144393857 is about 12016.3995023468. The cubic root of 144393857 is about 524.6257129668.

The spelling of 144393857 in words is "one hundred forty-four million, three hundred ninety-three thousand, eight hundred fifty-seven".