742173384457 has 2 divisors, whose sum is σ = 742173384458. Its totient is φ = 742173384456.

The previous prime is 742173384451. The next prime is 742173384503. The reversal of 742173384457 is 754483371247.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 726195413241 + 15977971216 = 852171^2 + 126404^2 .

It is an emirp because it is prime and its reverse (754483371247) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-742173384457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 742173384398 and 742173384407.

It is not a weakly prime, because it can be changed into another prime (742173384451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371086692228 + 371086692229.

It is an arithmetic number, because the mean of its divisors is an integer number (371086692229).

Almost surely, 2^742173384457 is an apocalyptic number.

It is an amenable number.

742173384457 is a deficient number, since it is larger than the sum of its proper divisors (1).

742173384457 is an equidigital number, since it uses as much as digits as its factorization.

742173384457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15805440, while the sum is 55.

The spelling of 742173384457 in words is "seven hundred forty-two billion, one hundred seventy-three million, three hundred eighty-four thousand, four hundred fifty-seven".