197114821 has 2 divisors, whose sum is σ = 197114822. Its totient is φ = 197114820.

The previous prime is 197114809. The next prime is 197114857. The reversal of 197114821 is 128411791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160934596 + 36180225 = 12686^2 + 6015^2 .

It is a cyclic number.

It is not a de Polignac number, because 197114821 - 2⁵ = 197114789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197114321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98557410 + 98557411.

It is an arithmetic number, because the mean of its divisors is an integer number (98557411).

Almost surely, 2^197114821 is an apocalyptic number.

It is an amenable number.

197114821 is a deficient number, since it is larger than the sum of its proper divisors (1).

197114821 is an equidigital number, since it uses as much as digits as its factorization.

197114821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 34.

The square root of 197114821 is about 14039.7585805455. The cubic root of 197114821 is about 581.9778109812.

The spelling of 197114821 in words is "one hundred ninety-seven million, one hundred fourteen thousand, eight hundred twenty-one".