197530861 has 16 divisors (see below), whose sum is σ = 223755840. Its totient is φ = 172730880.

The previous prime is 197530849. The next prime is 197530873. The reversal of 197530861 is 168035791.

It is an interprime number because it is at equal distance from previous prime (197530849) and next prime (197530873).

It is a cyclic number.

It is not a de Polignac number, because 197530861 - 2⁵ = 197530829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197537861) 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, 96925 + ... + 98941.

It is an arithmetic number, because the mean of its divisors is an integer number (13984740).

Almost surely, 2^197530861 is an apocalyptic number.

197530861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

197530861 is a deficient number, since it is larger than the sum of its proper divisors (26224979).

197530861 is a wasteful number, since it uses less digits than its factorization.

197530861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2364.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 197530861 is about 14054.5672647720. The cubic root of 197530861 is about 582.3869733484.

The spelling of 197530861 in words is "one hundred ninety-seven million, five hundred thirty thousand, eight hundred sixty-one".