11881807 has 4 divisors (see below), whose sum is σ = 13579216. Its totient is φ = 10184400.

The previous prime is 11881801. The next prime is 11881811. The reversal of 11881807 is 70818811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70818811 = 7 ⋅10116973.

It is a cyclic number.

It is not a de Polignac number, because 11881807 - 2³ = 11881799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11881801) 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, 848694 + ... + 848707.

It is an arithmetic number, because the mean of its divisors is an integer number (3394804).

Almost surely, 2^11881807 is an apocalyptic number.

11881807 is a deficient number, since it is larger than the sum of its proper divisors (1697409).

11881807 is an equidigital number, since it uses as much as digits as its factorization.

11881807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1697408.

The product of its (nonzero) digits is 3584, while the sum is 34.

The square root of 11881807 is about 3446.9997098926. Note that the first 3 decimals coincide. The cubic root of 11881807 is about 228.1887159735.

The spelling of 11881807 in words is "eleven million, eight hundred eighty-one thousand, eight hundred seven".