338498334721 has 2 divisors, whose sum is σ = 338498334722. Its totient is φ = 338498334720.

The previous prime is 338498334703. The next prime is 338498334731. The reversal of 338498334721 is 127433894833.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 254681715600 + 83816619121 = 504660^2 + 289511^2 .

It is a cyclic number.

It is not a de Polignac number, because 338498334721 - 2¹⁷ = 338498203649 is a prime.

It is a super-2 number, since 2×338498334721² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (338498334731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169249167360 + 169249167361.

It is an arithmetic number, because the mean of its divisors is an integer number (169249167361).

Almost surely, 2^338498334721 is an apocalyptic number.

It is an amenable number.

338498334721 is a deficient number, since it is larger than the sum of its proper divisors (1).

338498334721 is an equidigital number, since it uses as much as digits as its factorization.

338498334721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10450944, while the sum is 55.

The spelling of 338498334721 in words is "three hundred thirty-eight billion, four hundred ninety-eight million, three hundred thirty-four thousand, seven hundred twenty-one".