197987169 has 16 divisors (see below), whose sum is σ = 270278784. Its totient is φ = 128880000.

The previous prime is 197987161. The next prime is 197987183. The reversal of 197987169 is 961789791.

197987169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 197987169 - 2³ = 197987161 is a prime.

It is a super-2 number, since 2×197987169² = 78397838177269122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (197987161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17644 + ... + 26594.

It is an arithmetic number, because the mean of its divisors is an integer number (16892424).

Almost surely, 2^197987169 is an apocalyptic number.

It is an amenable number.

197987169 is a deficient number, since it is larger than the sum of its proper divisors (72291615).

197987169 is a wasteful number, since it uses less digits than its factorization.

With its successor (197987170) it forms an eRAP, since the sums of their prime factors are consecutive (9128 and 9129).

197987169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9128.

The product of its digits is 1714608, while the sum is 57.

The square root of 197987169 is about 14070.7913423517. The cubic root of 197987169 is about 582.8350779548.

The spelling of 197987169 in words is "one hundred ninety-seven million, nine hundred eighty-seven thousand, one hundred sixty-nine".