197156459 has 2 divisors, whose sum is σ = 197156460. Its totient is φ = 197156458.

The previous prime is 197156447. The next prime is 197156467. The reversal of 197156459 is 954651791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 197156459 - 2⁸ = 197156203 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (197156059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98578229 + 98578230.

It is an arithmetic number, because the mean of its divisors is an integer number (98578230).

Almost surely, 2^197156459 is an apocalyptic number.

197156459 is a deficient number, since it is larger than the sum of its proper divisors (1).

197156459 is an equidigital number, since it uses as much as digits as its factorization.

197156459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 340200, while the sum is 47.

The square root of 197156459 is about 14041.2413625007. The cubic root of 197156459 is about 582.0187865674.

The spelling of 197156459 in words is "one hundred ninety-seven million, one hundred fifty-six thousand, four hundred fifty-nine".