104872761781 has 2 divisors, whose sum is σ = 104872761782. Its totient is φ = 104872761780.

The previous prime is 104872761769. The next prime is 104872761823. The reversal of 104872761781 is 187167278401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102373761681 + 2499000100 = 319959^2 + 49990^2 .

It is an emirp because it is prime and its reverse (187167278401) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-104872761781 is a prime.

It is a super-2 number, since 2×104872761781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104872761181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52436380890 + 52436380891.

It is an arithmetic number, because the mean of its divisors is an integer number (52436380891).

Almost surely, 2^104872761781 is an apocalyptic number.

It is an amenable number.

104872761781 is a deficient number, since it is larger than the sum of its proper divisors (1).

104872761781 is an equidigital number, since it uses as much as digits as its factorization.

104872761781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1053696, while the sum is 52.

The spelling of 104872761781 in words is "one hundred four billion, eight hundred seventy-two million, seven hundred sixty-one thousand, seven hundred eighty-one".