197135863 has 2 divisors, whose sum is σ = 197135864. Its totient is φ = 197135862.

The previous prime is 197135767. The next prime is 197135879. The reversal of 197135863 is 368531791.

It is a strong prime.

It is an emirp because it is prime and its reverse (368531791) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197135863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197135363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98567931 + 98567932.

It is an arithmetic number, because the mean of its divisors is an integer number (98567932).

Almost surely, 2^197135863 is an apocalyptic number.

197135863 is a deficient number, since it is larger than the sum of its proper divisors (1).

197135863 is an equidigital number, since it uses as much as digits as its factorization.

197135863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 43.

The square root of 197135863 is about 14040.5079324076. The cubic root of 197135863 is about 581.9985189477.

The spelling of 197135863 in words is "one hundred ninety-seven million, one hundred thirty-five thousand, eight hundred sixty-three".