104540409 has 16 divisors (see below), whose sum is σ = 156744000. Its totient is φ = 68852448.

The previous prime is 104540399. The next prime is 104540411. The reversal of 104540409 is 904045401.

It is not a de Polignac number, because 104540409 - 2¹⁷ = 104409337 is a prime.

It is a super-2 number, since 2×104540409² = 21857394227774562, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (104540459) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21084 + ... + 25565.

It is an arithmetic number, because the mean of its divisors is an integer number (9796500).

Almost surely, 2^104540409 is an apocalyptic number.

It is an amenable number.

104540409 is a deficient number, since it is larger than the sum of its proper divisors (52203591).

104540409 is an equidigital number, since it uses as much as digits as its factorization.

104540409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46741 (or 46735 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 104540409 is about 10224.5004278938. The cubic root of 104540409 is about 471.0800707718.

The spelling of 104540409 in words is "one hundred four million, five hundred forty thousand, four hundred nine".