197137584877 has 2 divisors, whose sum is σ = 197137584878. Its totient is φ = 197137584876.

The previous prime is 197137584803. The next prime is 197137584883. The reversal of 197137584877 is 778485731791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116212128201 + 80925456676 = 340899^2 + 284474^2 .

It is a cyclic number.

It is not a de Polignac number, because 197137584877 - 2²³ = 197129196269 is a prime.

It is a super-2 number, since 2×197137584877² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197137584887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98568792438 + 98568792439.

It is an arithmetic number, because the mean of its divisors is an integer number (98568792439).

Almost surely, 2^197137584877 is an apocalyptic number.

It is an amenable number.

197137584877 is a deficient number, since it is larger than the sum of its proper divisors (1).

197137584877 is an equidigital number, since it uses as much as digits as its factorization.

197137584877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82978560, while the sum is 67.

The spelling of 197137584877 in words is "one hundred ninety-seven billion, one hundred thirty-seven million, five hundred eighty-four thousand, eight hundred seventy-seven".