197796121 has 2 divisors, whose sum is σ = 197796122. Its totient is φ = 197796120.

The previous prime is 197796101. The next prime is 197796133. The reversal of 197796121 is 121697791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197796096 + 25 = 14064^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 197796121 - 2²¹ = 195698969 is a prime.

It is not a weakly prime, because it can be changed into another prime (197796101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98898060 + 98898061.

It is an arithmetic number, because the mean of its divisors is an integer number (98898061).

Almost surely, 2^197796121 is an apocalyptic number.

It is an amenable number.

197796121 is a deficient number, since it is larger than the sum of its proper divisors (1).

197796121 is an equidigital number, since it uses as much as digits as its factorization.

197796121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47628, while the sum is 43.

The square root of 197796121 is about 14064.0008887941. Note that the first 3 decimals coincide. The cubic root of 197796121 is about 582.6475484441.

The spelling of 197796121 in words is "one hundred ninety-seven million, seven hundred ninety-six thousand, one hundred twenty-one".