11909402 has 8 divisors (see below), whose sum is σ = 17881236. Its totient is φ = 5948992.

The previous prime is 11909399. The next prime is 11909411. The reversal of 11909402 is 20490911.

It is a Cunningham number, because it is equal to 3451²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 11909401 + 1 = 3451^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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, 578 + ... + 4914.

Almost surely, 2^11909402 is an apocalyptic number.

11909402 is a deficient number, since it is larger than the sum of its proper divisors (5971834).

11909402 is a wasteful number, since it uses less digits than its factorization.

11909402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5712.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 11909402 is about 3451.0001448855. Note that the first 3 decimals coincide. The cubic root of 11909402 is about 228.3652323109.

The spelling of 11909402 in words is "eleven million, nine hundred nine thousand, four hundred two".