197671887 has 32 divisors (see below), whose sum is σ = 338741760. Its totient is φ = 111585600.

The previous prime is 197671853. The next prime is 197671891. The reversal of 197671887 is 788176791.

It is not a de Polignac number, because 197671887 - 2²⁶ = 130563023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197571887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9387 + ... + 21987.

It is an arithmetic number, because the mean of its divisors is an integer number (10585680).

Almost surely, 2^197671887 is an apocalyptic number.

197671887 is a deficient number, since it is larger than the sum of its proper divisors (141069873).

197671887 is a wasteful number, since it uses less digits than its factorization.

197671887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12700 (or 12694 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 54.

The square root of 197671887 is about 14059.5834575566. The cubic root of 197671887 is about 582.5255376329.

The spelling of 197671887 in words is "one hundred ninety-seven million, six hundred seventy-one thousand, eight hundred eighty-seven".