11854909 has 4 divisors (see below), whose sum is σ = 12932640. Its totient is φ = 10777180.

The previous prime is 11854901. The next prime is 11854919. The reversal of 11854909 is 90945811.

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: 90945811 = 11 ⋅8267801.

It is a cyclic number.

It is not a de Polignac number, because 11854909 - 2³ = 11854901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11854901) 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, 538849 + ... + 538870.

It is an arithmetic number, because the mean of its divisors is an integer number (3233160).

Almost surely, 2^11854909 is an apocalyptic number.

It is an amenable number.

11854909 is a deficient number, since it is larger than the sum of its proper divisors (1077731).

11854909 is a wasteful number, since it uses less digits than its factorization.

11854909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077730.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 11854909 is about 3443.0958453113. The cubic root of 11854909 is about 228.0163948916.

The spelling of 11854909 in words is "eleven million, eight hundred fifty-four thousand, nine hundred nine".