11945311 has 4 divisors (see below), whose sum is σ = 13651792. Its totient is φ = 10238832.

The previous prime is 11945293. The next prime is 11945321. The reversal of 11945311 is 11354911.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11945311 - 2⁵ = 11945279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11945321) 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, 853230 + ... + 853243.

It is an arithmetic number, because the mean of its divisors is an integer number (3412948).

Almost surely, 2^11945311 is an apocalyptic number.

11945311 is a deficient number, since it is larger than the sum of its proper divisors (1706481).

11945311 is an equidigital number, since it uses as much as digits as its factorization.

11945311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1706480.

The product of its digits is 540, while the sum is 25.

The square root of 11945311 is about 3456.1989236732. The cubic root of 11945311 is about 228.5945228339.

The spelling of 11945311 in words is "eleven million, nine hundred forty-five thousand, three hundred eleven".