196560891 has 8 divisors (see below), whose sum is σ = 291201360. Its totient is φ = 131040576.

The previous prime is 196560853. The next prime is 196560893. The reversal of 196560891 is 198065691.

196560891 is a `hidden beast` number, since 1 + 9 + 6 + 560 + 89 + 1 = 666.

It is not a de Polignac number, because 196560891 - 2⁶ = 196560827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (196560893) 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, 3639990 + ... + 3640043.

It is an arithmetic number, because the mean of its divisors is an integer number (36400170).

Almost surely, 2^196560891 is an apocalyptic number.

196560891 is a deficient number, since it is larger than the sum of its proper divisors (94640469).

196560891 is an equidigital number, since it uses as much as digits as its factorization.

196560891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7280042 (or 7280036 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 196560891 is about 14020.0175106881. The cubic root of 196560891 is about 581.4321435409.

The spelling of 196560891 in words is "one hundred ninety-six million, five hundred sixty thousand, eight hundred ninety-one".