838731826993 has 2 divisors, whose sum is σ = 838731826994. Its totient is φ = 838731826992.

The previous prime is 838731826931. The next prime is 838731827027. The reversal of 838731826993 is 399628137838.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 463683369249 + 375048457744 = 680943^2 + 612412^2 .

It is a cyclic number.

It is not a de Polignac number, because 838731826993 - 2²¹ = 838729729841 is a prime.

It is a super-2 number, since 2×838731826993² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (838731824993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419365913496 + 419365913497.

It is an arithmetic number, because the mean of its divisors is an integer number (419365913497).

Almost surely, 2^838731826993 is an apocalyptic number.

It is an amenable number.

838731826993 is a deficient number, since it is larger than the sum of its proper divisors (1).

838731826993 is an equidigital number, since it uses as much as digits as its factorization.

838731826993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94058496, while the sum is 67.

The spelling of 838731826993 in words is "eight hundred thirty-eight billion, seven hundred thirty-one million, eight hundred twenty-six thousand, nine hundred ninety-three".