197860685 has 16 divisors (see below), whose sum is σ = 259301952. Its totient is φ = 143740800.

The previous prime is 197860681. The next prime is 197860709. The reversal of 197860685 is 586068791.

It is a happy number.

It is not a de Polignac number, because 197860685 - 2² = 197860681 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197860681) 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, 77225 + ... + 79745.

It is an arithmetic number, because the mean of its divisors is an integer number (16206372).

Almost surely, 2^197860685 is an apocalyptic number.

It is an amenable number.

197860685 is a deficient number, since it is larger than the sum of its proper divisors (61441267).

197860685 is a wasteful number, since it uses less digits than its factorization.

197860685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3964.

The product of its (nonzero) digits is 725760, while the sum is 50.

The square root of 197860685 is about 14066.2960654182. The cubic root of 197860685 is about 582.7109368864.

The spelling of 197860685 in words is "one hundred ninety-seven million, eight hundred sixty thousand, six hundred eighty-five".