197953543 has 2 divisors, whose sum is σ = 197953544. Its totient is φ = 197953542.

The previous prime is 197953529. The next prime is 197953549. The reversal of 197953543 is 345359791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 197953543 - 2¹³ = 197945351 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 197953493 and 197953502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197953549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98976771 + 98976772.

It is an arithmetic number, because the mean of its divisors is an integer number (98976772).

Almost surely, 2^197953543 is an apocalyptic number.

197953543 is a deficient number, since it is larger than the sum of its proper divisors (1).

197953543 is an equidigital number, since it uses as much as digits as its factorization.

197953543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 510300, while the sum is 46.

The square root of 197953543 is about 14069.5964050146. The cubic root of 197953543 is about 582.8020799882.

The spelling of 197953543 in words is "one hundred ninety-seven million, nine hundred fifty-three thousand, five hundred forty-three".