197871742153 has 2 divisors, whose sum is σ = 197871742154. Its totient is φ = 197871742152.

The previous prime is 197871742039. The next prime is 197871742169. The reversal of 197871742153 is 351247178791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118272712464 + 79599029689 = 343908^2 + 282133^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197871742153 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 197871742094 and 197871742103.

It is not a weakly prime, because it can be changed into another prime (197871742183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98935871076 + 98935871077.

It is an arithmetic number, because the mean of its divisors is an integer number (98935871077).

Almost surely, 2^197871742153 is an apocalyptic number.

It is an amenable number.

197871742153 is a deficient number, since it is larger than the sum of its proper divisors (1).

197871742153 is an equidigital number, since it uses as much as digits as its factorization.

197871742153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2963520, while the sum is 55.

The spelling of 197871742153 in words is "one hundred ninety-seven billion, eight hundred seventy-one million, seven hundred forty-two thousand, one hundred fifty-three".