197107785827 has 2 divisors, whose sum is σ = 197107785828. Its totient is φ = 197107785826.

The previous prime is 197107785703. The next prime is 197107785851. The reversal of 197107785827 is 728587701791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 197107785827 - 2⁸ = 197107785571 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 197107785827.

It is not a weakly prime, because it can be changed into another prime (197107755827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98553892913 + 98553892914.

It is an arithmetic number, because the mean of its divisors is an integer number (98553892914).

Almost surely, 2^197107785827 is an apocalyptic number.

197107785827 is a deficient number, since it is larger than the sum of its proper divisors (1).

197107785827 is an equidigital number, since it uses as much as digits as its factorization.

197107785827 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13829760, while the sum is 62.

The spelling of 197107785827 in words is "one hundred ninety-seven billion, one hundred seven million, seven hundred eighty-five thousand, eight hundred twenty-seven".