197460809 has 16 divisors (see below), whose sum is σ = 244309632. Its totient is φ = 155409408.

The previous prime is 197460779. The next prime is 197460811. The reversal of 197460809 is 908064791.

It is not a de Polignac number, because 197460809 - 2¹² = 197456713 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 197460809.

It is not an unprimeable number, because it can be changed into a prime (197460889) 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, 11942 + ... + 23184.

It is an arithmetic number, because the mean of its divisors is an integer number (15269352).

Almost surely, 2^197460809 is an apocalyptic number.

It is an amenable number.

197460809 is a deficient number, since it is larger than the sum of its proper divisors (46848823).

197460809 is a wasteful number, since it uses less digits than its factorization.

197460809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11456.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 197460809 is about 14052.0749001704. The cubic root of 197460809 is about 582.3181196416.

The spelling of 197460809 in words is "one hundred ninety-seven million, four hundred sixty thousand, eight hundred nine".