196564409 has 8 divisors (see below), whose sum is σ = 197821440. Its totient is φ = 195312016.

The previous prime is 196564351. The next prime is 196564411. The reversal of 196564409 is 904465691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196564409 is a prime.

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 196564409.

It is not an unprimeable number, because it can be changed into a prime (196564429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120602 + ... + 122220.

It is an arithmetic number, because the mean of its divisors is an integer number (24727680).

Almost surely, 2^196564409 is an apocalyptic number.

It is an amenable number.

196564409 is a deficient number, since it is larger than the sum of its proper divisors (1257031).

196564409 is a wasteful number, since it uses less digits than its factorization.

196564409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2319.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 196564409 is about 14020.1429735934. The cubic root of 196564409 is about 581.4356122982.

The spelling of 196564409 in words is "one hundred ninety-six million, five hundred sixty-four thousand, four hundred nine".