197870887 has 2 divisors, whose sum is σ = 197870888. Its totient is φ = 197870886.

The previous prime is 197870867. The next prime is 197870891. The reversal of 197870887 is 788078791.

It is a strong prime.

It is an emirp because it is prime and its reverse (788078791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 197870887 - 2⁷ = 197870759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197870867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98935443 + 98935444.

It is an arithmetic number, because the mean of its divisors is an integer number (98935444).

Almost surely, 2^197870887 is an apocalyptic number.

197870887 is a deficient number, since it is larger than the sum of its proper divisors (1).

197870887 is an equidigital number, since it uses as much as digits as its factorization.

197870887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1580544, while the sum is 55.

The square root of 197870887 is about 14066.6587006297. The cubic root of 197870887 is about 582.7209518704.

The spelling of 197870887 in words is "one hundred ninety-seven million, eight hundred seventy thousand, eight hundred eighty-seven".