197811433 has 2 divisors, whose sum is σ = 197811434. Its totient is φ = 197811432.

The previous prime is 197811409. The next prime is 197811437. The reversal of 197811433 is 334118791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191324224 + 6487209 = 13832^2 + 2547^2 .

It is a cyclic number.

It is not a de Polignac number, because 197811433 - 2⁵ = 197811401 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 197811392 and 197811401.

It is not a weakly prime, because it can be changed into another prime (197811437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98905716 + 98905717.

It is an arithmetic number, because the mean of its divisors is an integer number (98905717).

Almost surely, 2^197811433 is an apocalyptic number.

It is an amenable number.

197811433 is a deficient number, since it is larger than the sum of its proper divisors (1).

197811433 is an equidigital number, since it uses as much as digits as its factorization.

197811433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 37.

The square root of 197811433 is about 14064.5452468254. The cubic root of 197811433 is about 582.6625828964.

The spelling of 197811433 in words is "one hundred ninety-seven million, eight hundred eleven thousand, four hundred thirty-three".