11921827 has 2 divisors, whose sum is σ = 11921828. Its totient is φ = 11921826.

The previous prime is 11921773. The next prime is 11921851. The reversal of 11921827 is 72812911.

It is a strong prime.

It is an emirp because it is prime and its reverse (72812911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11921827 - 2⁷ = 11921699 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11921867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5960913 + 5960914.

It is an arithmetic number, because the mean of its divisors is an integer number (5960914).

Almost surely, 2^11921827 is an apocalyptic number.

11921827 is a deficient number, since it is larger than the sum of its proper divisors (1).

11921827 is an equidigital number, since it uses as much as digits as its factorization.

11921827 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 31.

The square root of 11921827 is about 3452.7998783596. The cubic root of 11921827 is about 228.4446220183. Note that the first 3 decimals are identical.

The spelling of 11921827 in words is "eleven million, nine hundred twenty-one thousand, eight hundred twenty-seven".