17797121 has 2 divisors, whose sum is σ = 17797122. Its totient is φ = 17797120.

The previous prime is 17797103. The next prime is 17797123. The reversal of 17797121 is 12179771.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17098225 + 698896 = 4135^2 + 836^2 .

It is a cyclic number.

It is not a de Polignac number, because 17797121 - 2⁶ = 17797057 is a prime.

Together with 17797123, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (17797123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8898560 + 8898561.

It is an arithmetic number, because the mean of its divisors is an integer number (8898561).

Almost surely, 2^17797121 is an apocalyptic number.

It is an amenable number.

17797121 is a deficient number, since it is larger than the sum of its proper divisors (1).

17797121 is an equidigital number, since it uses as much as digits as its factorization.

17797121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6174, while the sum is 35.

The square root of 17797121 is about 4218.6634139263. The cubic root of 17797121 is about 261.0857994611.

The spelling of 17797121 in words is "seventeen million, seven hundred ninety-seven thousand, one hundred twenty-one".