104056409 has 2 divisors, whose sum is σ = 104056410. Its totient is φ = 104056408.

The previous prime is 104056399. The next prime is 104056411. The reversal of 104056409 is 904650401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66504025 + 37552384 = 8155^2 + 6128^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-104056409 is a prime.

It is a super-3 number, since 3×104056409³ (a number of 25 digits) contains 333 as substring.

Together with 104056411, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (104056489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52028204 + 52028205.

It is an arithmetic number, because the mean of its divisors is an integer number (52028205).

Almost surely, 2^104056409 is an apocalyptic number.

It is an amenable number.

104056409 is a deficient number, since it is larger than the sum of its proper divisors (1).

104056409 is an equidigital number, since it uses as much as digits as its factorization.

104056409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 104056409 is about 10200.8043310319. The cubic root of 104056409 is about 470.3519455347.

The spelling of 104056409 in words is "one hundred four million, fifty-six thousand, four hundred nine".