104997581 has 4 divisors (see below), whose sum is σ = 113074332. Its totient is φ = 96920832.

The previous prime is 104997551. The next prime is 104997583. The reversal of 104997581 is 185799401.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61371556 + 43626025 = 7834^2 + 6605^2 .

It is a cyclic number.

It is not a de Polignac number, because 104997581 - 2²² = 100803277 is a prime.

It is a super-2 number, since 2×104997581² = 22048984031703122, 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 (104997583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4038356 + ... + 4038381.

It is an arithmetic number, because the mean of its divisors is an integer number (28268583).

Almost surely, 2^104997581 is an apocalyptic number.

It is an amenable number.

104997581 is a deficient number, since it is larger than the sum of its proper divisors (8076751).

104997581 is an equidigital number, since it uses as much as digits as its factorization.

104997581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8076750.

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 104997581 is about 10246.8327301659. The cubic root of 104997581 is about 471.7657751144.

The spelling of 104997581 in words is "one hundred four million, nine hundred ninety-seven thousand, five hundred eighty-one".