11643851 has 2 divisors, whose sum is σ = 11643852. Its totient is φ = 11643850.

The previous prime is 11643839. The next prime is 11643857. The reversal of 11643851 is 15834611.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11643851 is a prime.

It is a super-2 number, since 2×11643851² = 271158532220402, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11643857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5821925 + 5821926.

It is an arithmetic number, because the mean of its divisors is an integer number (5821926).

Almost surely, 2^11643851 is an apocalyptic number.

11643851 is a deficient number, since it is larger than the sum of its proper divisors (1).

11643851 is an equidigital number, since it uses as much as digits as its factorization.

11643851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 29.

The square root of 11643851 is about 3412.3087492195. The cubic root of 11643851 is about 226.6551265270.

The spelling of 11643851 in words is "eleven million, six hundred forty-three thousand, eight hundred fifty-one".