197172497 has 2 divisors, whose sum is σ = 197172498. Its totient is φ = 197172496.

The previous prime is 197172433. The next prime is 197172499. The reversal of 197172497 is 794271791.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189310081 + 7862416 = 13759^2 + 2804^2 .

It is a cyclic number.

It is not a de Polignac number, because 197172497 - 2⁶ = 197172433 is a prime.

Together with 197172499, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (197172499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98586248 + 98586249.

It is an arithmetic number, because the mean of its divisors is an integer number (98586249).

Almost surely, 2^197172497 is an apocalyptic number.

It is an amenable number.

197172497 is a deficient number, since it is larger than the sum of its proper divisors (1).

197172497 is an equidigital number, since it uses as much as digits as its factorization.

197172497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 222264, while the sum is 47.

The square root of 197172497 is about 14041.8124542382. The cubic root of 197172497 is about 582.0345678818.

The spelling of 197172497 in words is "one hundred ninety-seven million, one hundred seventy-two thousand, four hundred ninety-seven".