144899917 has 2 divisors, whose sum is σ = 144899918. Its totient is φ = 144899916.

The previous prime is 144899903. The next prime is 144899957. The reversal of 144899917 is 719998441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144456361 + 443556 = 12019^2 + 666^2 .

It is an emirp because it is prime and its reverse (719998441) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144899917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144899957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72449958 + 72449959.

It is an arithmetic number, because the mean of its divisors is an integer number (72449959).

Almost surely, 2^144899917 is an apocalyptic number.

It is an amenable number.

144899917 is a deficient number, since it is larger than the sum of its proper divisors (1).

144899917 is an equidigital number, since it uses as much as digits as its factorization.

144899917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 52.

The square root of 144899917 is about 12037.4381410664. The cubic root of 144899917 is about 525.2378870529.

The spelling of 144899917 in words is "one hundred forty-four million, eight hundred ninety-nine thousand, nine hundred seventeen".