197116729 has 2 divisors, whose sum is σ = 197116730. Its totient is φ = 197116728.

The previous prime is 197116727. The next prime is 197116753. The reversal of 197116729 is 927611791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196756729 + 360000 = 14027^2 + 600^2 .

It is a cyclic number.

It is not a de Polignac number, because 197116729 - 2¹ = 197116727 is a prime.

Together with 197116727, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (197116727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98558364 + 98558365.

It is an arithmetic number, because the mean of its divisors is an integer number (98558365).

Almost surely, 2^197116729 is an apocalyptic number.

It is an amenable number.

197116729 is a deficient number, since it is larger than the sum of its proper divisors (1).

197116729 is an equidigital number, since it uses as much as digits as its factorization.

197116729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47628, while the sum is 43.

The square root of 197116729 is about 14039.8265302674. The cubic root of 197116729 is about 581.9796887532.

The spelling of 197116729 in words is "one hundred ninety-seven million, one hundred sixteen thousand, seven hundred twenty-nine".