197454553 has 2 divisors, whose sum is σ = 197454554. Its totient is φ = 197454552.

The previous prime is 197454527. The next prime is 197454559. The reversal of 197454553 is 355454791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 169702729 + 27751824 = 13027^2 + 5268^2 .

It is an emirp because it is prime and its reverse (355454791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 197454553 - 2⁹ = 197454041 is a prime.

It is not a weakly prime, because it can be changed into another prime (197454559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98727276 + 98727277.

It is an arithmetic number, because the mean of its divisors is an integer number (98727277).

Almost surely, 2^197454553 is an apocalyptic number.

It is an amenable number.

197454553 is a deficient number, since it is larger than the sum of its proper divisors (1).

197454553 is an equidigital number, since it uses as much as digits as its factorization.

197454553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 378000, while the sum is 43.

The square root of 197454553 is about 14051.8522978289. The cubic root of 197454553 is about 582.3119698632.

The spelling of 197454553 in words is "one hundred ninety-seven million, four hundred fifty-four thousand, five hundred fifty-three".