338405549947 has 2 divisors, whose sum is σ = 338405549948. Its totient is φ = 338405549946.

The previous prime is 338405549939. The next prime is 338405549969. The reversal of 338405549947 is 749945504833.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 338405549947 - 2³ = 338405549939 is a prime.

It is a super-2 number, since 2×338405549947² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (338405549927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169202774973 + 169202774974.

It is an arithmetic number, because the mean of its divisors is an integer number (169202774974).

Almost surely, 2^338405549947 is an apocalyptic number.

338405549947 is a deficient number, since it is larger than the sum of its proper divisors (1).

338405549947 is an equidigital number, since it uses as much as digits as its factorization.

338405549947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 65318400, while the sum is 61.

The spelling of 338405549947 in words is "three hundred thirty-eight billion, four hundred five million, five hundred forty-nine thousand, nine hundred forty-seven".