197945459 has 2 divisors, whose sum is σ = 197945460. Its totient is φ = 197945458.

The previous prime is 197945381. The next prime is 197945497. The reversal of 197945459 is 954549791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 197945459 - 2⁸ = 197945203 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 197945459.

It is not a weakly prime, because it can be changed into another prime (197945959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98972729 + 98972730.

It is an arithmetic number, because the mean of its divisors is an integer number (98972730).

Almost surely, 2^197945459 is an apocalyptic number.

197945459 is a deficient number, since it is larger than the sum of its proper divisors (1).

197945459 is an equidigital number, since it uses as much as digits as its factorization.

197945459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2041200, while the sum is 53.

The square root of 197945459 is about 14069.3091159445. The cubic root of 197945459 is about 582.7941464161.

The spelling of 197945459 in words is "one hundred ninety-seven million, nine hundred forty-five thousand, four hundred fifty-nine".