197806490471 has 2 divisors, whose sum is σ = 197806490472. Its totient is φ = 197806490470.

The previous prime is 197806490363. The next prime is 197806490489. The reversal of 197806490471 is 174094608791.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197806490471 is a prime.

It is a super-3 number, since 3×197806490471³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197806490491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98903245235 + 98903245236.

It is an arithmetic number, because the mean of its divisors is an integer number (98903245236).

Almost surely, 2^197806490471 is an apocalyptic number.

197806490471 is a deficient number, since it is larger than the sum of its proper divisors (1).

197806490471 is an equidigital number, since it uses as much as digits as its factorization.

197806490471 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3048192, while the sum is 56.

The spelling of 197806490471 in words is "one hundred ninety-seven billion, eight hundred six million, four hundred ninety thousand, four hundred seventy-one".