11798021 has 2 divisors, whose sum is σ = 11798022. Its totient is φ = 11798020.

The previous prime is 11798009. The next prime is 11798023. The reversal of 11798021 is 12089711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10144225 + 1653796 = 3185^2 + 1286^2 .

It is a cyclic number.

It is not a de Polignac number, because 11798021 - 2⁶ = 11797957 is a prime.

Together with 11798023, 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 (11798023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5899010 + 5899011.

It is an arithmetic number, because the mean of its divisors is an integer number (5899011).

Almost surely, 2^11798021 is an apocalyptic number.

It is an amenable number.

11798021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11798021 is an equidigital number, since it uses as much as digits as its factorization.

11798021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 29.

The square root of 11798021 is about 3434.8247407983. The cubic root of 11798021 is about 227.6510834772.

The spelling of 11798021 in words is "eleven million, seven hundred ninety-eight thousand, twenty-one".