11860409 has 4 divisors (see below), whose sum is σ = 12938640. Its totient is φ = 10782180.

The previous prime is 11860397. The next prime is 11860411. The reversal of 11860409 is 90406811.

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: 90406811 = 11 ⋅8218801.

It is a cyclic number.

It is not a de Polignac number, because 11860409 - 2¹⁶ = 11794873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11860469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 539099 + ... + 539120.

It is an arithmetic number, because the mean of its divisors is an integer number (3234660).

Almost surely, 2^11860409 is an apocalyptic number.

It is an amenable number.

11860409 is a deficient number, since it is larger than the sum of its proper divisors (1078231).

11860409 is a wasteful number, since it uses less digits than its factorization.

11860409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078230.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 11860409 is about 3443.8944525058. The cubic root of 11860409 is about 228.0516516301.

The spelling of 11860409 in words is "eleven million, eight hundred sixty thousand, four hundred nine".