197678869 has 16 divisors (see below), whose sum is σ = 214663680. Its totient is φ = 181424880.

The previous prime is 197678863. The next prime is 197678881. The reversal of 197678869 is 968876791.

197678869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 197678869 - 2³ = 197678861 is a prime.

It is a super-2 number, since 2×197678869² = 78153870498238322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197678861) 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, 106104 + ... + 107950.

It is an arithmetic number, because the mean of its divisors is an integer number (13416480).

Almost surely, 2^197678869 is an apocalyptic number.

197678869 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

197678869 is a deficient number, since it is larger than the sum of its proper divisors (16984811).

197678869 is a wasteful number, since it uses less digits than its factorization.

197678869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2040.

The product of its digits is 9144576, while the sum is 61.

The square root of 197678869 is about 14059.8317557501. The cubic root of 197678869 is about 582.5323960443.

The spelling of 197678869 in words is "one hundred ninety-seven million, six hundred seventy-eight thousand, eight hundred sixty-nine".