11811907 has 4 divisors (see below), whose sum is σ = 11825680. Its totient is φ = 11798136.

The previous prime is 11811887. The next prime is 11811913. The reversal of 11811907 is 70911811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70911811 = 17 ⋅4171283.

It is a cyclic number.

It is not a de Polignac number, because 11811907 - 2¹¹ = 11809859 is a prime.

It is a super-2 number, since 2×11811907² = 279042293953298, which contains 22 as substring.

It is a deceptive number, since it divides R_11811906.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11811607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5508 + ... + 7345.

It is an arithmetic number, because the mean of its divisors is an integer number (2956420).

Almost surely, 2^11811907 is an apocalyptic number.

11811907 is a deficient number, since it is larger than the sum of its proper divisors (13773).

11811907 is an equidigital number, since it uses as much as digits as its factorization.

11811907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13772.

The product of its (nonzero) digits is 504, while the sum is 28.

The square root of 11811907 is about 3436.8455013282. The cubic root of 11811907 is about 227.7403618274.

The spelling of 11811907 in words is "eleven million, eight hundred eleven thousand, nine hundred seven".