144775817 has 2 divisors, whose sum is σ = 144775818. Its totient is φ = 144775816.

The previous prime is 144775781. The next prime is 144775831. The reversal of 144775817 is 718577441.

Together with previous prime (144775781) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136913401 + 7862416 = 11701^2 + 2804^2 .

It is a cyclic number.

It is not a de Polignac number, because 144775817 - 2¹² = 144771721 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (144705817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72387908 + 72387909.

It is an arithmetic number, because the mean of its divisors is an integer number (72387909).

Almost surely, 2^144775817 is an apocalyptic number.

It is an amenable number.

144775817 is a deficient number, since it is larger than the sum of its proper divisors (1).

144775817 is an equidigital number, since it uses as much as digits as its factorization.

144775817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 219520, while the sum is 44.

The square root of 144775817 is about 12032.2822855849. The cubic root of 144775817 is about 525.0878969990.

The spelling of 144775817 in words is "one hundred forty-four million, seven hundred seventy-five thousand, eight hundred seventeen".