338731020809 has 2 divisors, whose sum is σ = 338731020810. Its totient is φ = 338731020808.

The previous prime is 338731020731. The next prime is 338731020827. The reversal of 338731020809 is 908020137833.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 329996249209 + 8734771600 = 574453^2 + 93460^2 .

It is a cyclic number.

It is not a de Polignac number, because 338731020809 - 2³² = 334436053513 is a prime.

It is a super-2 number, since 2×338731020809² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 338731020809.

It is not a weakly prime, because it can be changed into another prime (338731020829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169365510404 + 169365510405.

It is an arithmetic number, because the mean of its divisors is an integer number (169365510405).

Almost surely, 2^338731020809 is an apocalyptic number.

It is an amenable number.

338731020809 is a deficient number, since it is larger than the sum of its proper divisors (1).

338731020809 is an equidigital number, since it uses as much as digits as its factorization.

338731020809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 44.

The spelling of 338731020809 in words is "three hundred thirty-eight billion, seven hundred thirty-one million, twenty thousand, eight hundred nine".