197841869 has 16 divisors (see below), whose sum is σ = 212874480. Its totient is φ = 183214080.

The previous prime is 197841863. The next prime is 197841881. The reversal of 197841869 is 968148791.

It can be written as a sum of positive squares in 8 ways, for example, as 82537225 + 115304644 = 9085^2 + 10738^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197841869 is a prime.

It is a super-2 number, since 2×197841869² = 78282810258826322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 197841869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197841863) 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 15 ways as a sum of consecutive naturals, for example, 347417 + ... + 347985.

It is an arithmetic number, because the mean of its divisors is an integer number (13304655).

Almost surely, 2^197841869 is an apocalyptic number.

It is an amenable number.

197841869 is a deficient number, since it is larger than the sum of its proper divisors (15032611).

197841869 is a wasteful number, since it uses less digits than its factorization.

197841869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880.

The product of its digits is 870912, while the sum is 53.

The square root of 197841869 is about 14065.6272167294. The cubic root of 197841869 is about 582.6924649052.

The spelling of 197841869 in words is "one hundred ninety-seven million, eight hundred forty-one thousand, eight hundred sixty-nine".