104717781 has 24 divisors (see below), whose sum is σ = 180385920. Its totient is φ = 57236256.

The previous prime is 104717777. The next prime is 104717801. The reversal of 104717781 is 187717401.

It is a happy number.

It is not a de Polignac number, because 104717781 - 2² = 104717777 is a prime.

It is a super-2 number, since 2×104717781² = 21931627315127922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104717761) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34686 + ... + 37583.

It is an arithmetic number, because the mean of its divisors is an integer number (7516080).

Almost surely, 2^104717781 is an apocalyptic number.

It is an amenable number.

104717781 is a deficient number, since it is larger than the sum of its proper divisors (75668139).

104717781 is a wasteful number, since it uses less digits than its factorization.

104717781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72305 (or 72302 counting only the distinct ones).

The product of its (nonzero) digits is 10976, while the sum is 36.

The square root of 104717781 is about 10233.1706230278. The cubic root of 104717781 is about 471.3463448482.

The spelling of 104717781 in words is "one hundred four million, seven hundred seventeen thousand, seven hundred eighty-one".