104077781 has 8 divisors (see below), whose sum is σ = 110577720. Its totient is φ = 97771968.

The previous prime is 104077777. The next prime is 104077789. The reversal of 104077781 is 187770401.

It can be written as a sum of positive squares in 4 ways, for example, as 13256881 + 90820900 = 3641^2 + 9530^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 104077781 - 2² = 104077777 is a prime.

It is a super-2 number, since 2×104077781² = 21664368995767922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104077789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47426 + ... + 49571.

It is an arithmetic number, because the mean of its divisors is an integer number (13822215).

Almost surely, 2^104077781 is an apocalyptic number.

It is an amenable number.

104077781 is a deficient number, since it is larger than the sum of its proper divisors (6499939).

104077781 is an equidigital number, since it uses as much as digits as its factorization.

104077781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97063.

The product of its (nonzero) digits is 10976, while the sum is 35.

The square root of 104077781 is about 10201.8518417001. The cubic root of 104077781 is about 470.3841449726.

The spelling of 104077781 in words is "one hundred four million, seventy-seven thousand, seven hundred eighty-one".