197165951 has 2 divisors, whose sum is σ = 197165952. Its totient is φ = 197165950.

The previous prime is 197165929. The next prime is 197165957. The reversal of 197165951 is 159561791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 197165951 - 2⁶ = 197165887 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197165957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98582975 + 98582976.

It is an arithmetic number, because the mean of its divisors is an integer number (98582976).

Almost surely, 2^197165951 is an apocalyptic number.

197165951 is a deficient number, since it is larger than the sum of its proper divisors (1).

197165951 is an equidigital number, since it uses as much as digits as its factorization.

197165951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 85050, while the sum is 44.

The square root of 197165951 is about 14041.5793627355. The cubic root of 197165951 is about 582.0281267528.

The spelling of 197165951 in words is "one hundred ninety-seven million, one hundred sixty-five thousand, nine hundred fifty-one".