197796877 has 2 divisors, whose sum is σ = 197796878. Its totient is φ = 197796876.

The previous prime is 197796847. The next prime is 197796881. The reversal of 197796877 is 778697791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197514916 + 281961 = 14054^2 + 531^2 .

It is an emirp because it is prime and its reverse (778697791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 197796877 - 2¹¹ = 197794829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197796817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98898438 + 98898439.

It is an arithmetic number, because the mean of its divisors is an integer number (98898439).

Almost surely, 2^197796877 is an apocalyptic number.

It is an amenable number.

197796877 is a deficient number, since it is larger than the sum of its proper divisors (1).

197796877 is an equidigital number, since it uses as much as digits as its factorization.

197796877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9335088, while the sum is 61.

The square root of 197796877 is about 14064.0277658998. The cubic root of 197796877 is about 582.6482907589.

The spelling of 197796877 in words is "one hundred ninety-seven million, seven hundred ninety-six thousand, eight hundred seventy-seven".