444399680729 has 2 divisors, whose sum is σ = 444399680730. Its totient is φ = 444399680728.

The previous prime is 444399680717. The next prime is 444399680731. The reversal of 444399680729 is 927086993444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 431642430025 + 12757250704 = 656995^2 + 112948^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-444399680729 is a prime.

Together with 444399680731, 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 (444399680429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222199840364 + 222199840365.

It is an arithmetic number, because the mean of its divisors is an integer number (222199840365).

Almost surely, 2^444399680729 is an apocalyptic number.

It is an amenable number.

444399680729 is a deficient number, since it is larger than the sum of its proper divisors (1).

444399680729 is an equidigital number, since it uses as much as digits as its factorization.

444399680729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94058496, while the sum is 65.

The spelling of 444399680729 in words is "four hundred forty-four billion, three hundred ninety-nine million, six hundred eighty thousand, seven hundred twenty-nine".