11639851 has 2 divisors, whose sum is σ = 11639852. Its totient is φ = 11639850.

The previous prime is 11639839. The next prime is 11639869. The reversal of 11639851 is 15893611.

11639851 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11639851 - 2⁵ = 11639819 is a prime.

It is a super-2 number, since 2×11639851² = 270972262604402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11639051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5819925 + 5819926.

It is an arithmetic number, because the mean of its divisors is an integer number (5819926).

Almost surely, 2^11639851 is an apocalyptic number.

11639851 is a deficient number, since it is larger than the sum of its proper divisors (1).

11639851 is an equidigital number, since it uses as much as digits as its factorization.

11639851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 34.

The square root of 11639851 is about 3411.7225854398. The cubic root of 11639851 is about 226.6291693547.

The spelling of 11639851 in words is "eleven million, six hundred thirty-nine thousand, eight hundred fifty-one".