197253997 has 2 divisors, whose sum is σ = 197253998. Its totient is φ = 197253996.

The previous prime is 197253989. The next prime is 197254019. The reversal of 197253997 is 799352791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175854121 + 21399876 = 13261^2 + 4626^2 .

It is a cyclic number.

It is not a de Polignac number, because 197253997 - 2³ = 197253989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197253967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98626998 + 98626999.

It is an arithmetic number, because the mean of its divisors is an integer number (98626999).

Almost surely, 2^197253997 is an apocalyptic number.

It is an amenable number.

197253997 is a deficient number, since it is larger than the sum of its proper divisors (1).

197253997 is an equidigital number, since it uses as much as digits as its factorization.

197253997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1071630, while the sum is 52.

The square root of 197253997 is about 14044.7142014354. The cubic root of 197253997 is about 582.1147502665.

The spelling of 197253997 in words is "one hundred ninety-seven million, two hundred fifty-three thousand, nine hundred ninety-seven".