104536781 has 2 divisors, whose sum is σ = 104536782. Its totient is φ = 104536780.

The previous prime is 104536769. The next prime is 104536799. The reversal of 104536781 is 187635401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104244100 + 292681 = 10210^2 + 541^2 .

It is an emirp because it is prime and its reverse (187635401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 104536781 - 2¹⁸ = 104274637 is a prime.

It is a super-2 number, since 2×104536781² = 21855877163683922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104536711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52268390 + 52268391.

It is an arithmetic number, because the mean of its divisors is an integer number (52268391).

Almost surely, 2^104536781 is an apocalyptic number.

It is an amenable number.

104536781 is a deficient number, since it is larger than the sum of its proper divisors (1).

104536781 is an equidigital number, since it uses as much as digits as its factorization.

104536781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 104536781 is about 10224.3230093733. The cubic root of 104536781 is about 471.0746212100.

The spelling of 104536781 in words is "one hundred four million, five hundred thirty-six thousand, seven hundred eighty-one".