10018409 has 4 divisors (see below), whose sum is σ = 10454016. Its totient is φ = 9582804.

The previous prime is 10018357. The next prime is 10018429. The reversal of 10018409 is 90481001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90481001 = 13 ⋅6960077.

It is a cyclic number.

It is not a de Polignac number, because 10018409 - 2⁸ = 10018153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 435583 = 10018409 / (1 + 0 + 0 + 1 + 8 + 4 + 0 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10018429) 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 3 ways as a sum of consecutive naturals, for example, 217769 + ... + 217814.

It is an arithmetic number, because the mean of its divisors is an integer number (2613504).

Almost surely, 2^10018409 is an apocalyptic number.

It is an amenable number.

10018409 is a deficient number, since it is larger than the sum of its proper divisors (435607).

10018409 is an equidigital number, since it uses as much as digits as its factorization.

10018409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435606.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 10018409 is about 3165.1870402869. The cubic root of 10018409 is about 215.5755912557.

The spelling of 10018409 in words is "ten million, eighteen thousand, four hundred nine".