11649887 has 2 divisors, whose sum is σ = 11649888. Its totient is φ = 11649886.

The previous prime is 11649881. The next prime is 11649889. The reversal of 11649887 is 78894611.

It is a strong prime.

It is an emirp because it is prime and its reverse (78894611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11649887 - 2⁶ = 11649823 is a prime.

It is a super-2 number, since 2×11649887² = 271439734225538, which contains 22 as substring.

Together with 11649889, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11649881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5824943 + 5824944.

It is an arithmetic number, because the mean of its divisors is an integer number (5824944).

Almost surely, 2^11649887 is an apocalyptic number.

11649887 is a deficient number, since it is larger than the sum of its proper divisors (1).

11649887 is an equidigital number, since it uses as much as digits as its factorization.

11649887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 44.

The square root of 11649887 is about 3413.1930798008. The cubic root of 11649887 is about 226.6942846490.

The spelling of 11649887 in words is "eleven million, six hundred forty-nine thousand, eight hundred eighty-seven".