197885497 has 2 divisors, whose sum is σ = 197885498. Its totient is φ = 197885496.

The previous prime is 197885489. The next prime is 197885521. The reversal of 197885497 is 794588791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197796096 + 89401 = 14064^2 + 299^2 .

It is a cyclic number.

It is not a de Polignac number, because 197885497 - 2³ = 197885489 is a prime.

It is not a weakly prime, because it can be changed into another prime (197885447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98942748 + 98942749.

It is an arithmetic number, because the mean of its divisors is an integer number (98942749).

Almost surely, 2^197885497 is an apocalyptic number.

It is an amenable number.

197885497 is a deficient number, since it is larger than the sum of its proper divisors (1).

197885497 is an equidigital number, since it uses as much as digits as its factorization.

197885497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5080320, while the sum is 58.

The square root of 197885497 is about 14067.1780041343. The cubic root of 197885497 is about 582.7352934506.

The spelling of 197885497 in words is "one hundred ninety-seven million, eight hundred eighty-five thousand, four hundred ninety-seven".