196545691 has 4 divisors (see below), whose sum is σ = 196648384. Its totient is φ = 196443000.

The previous prime is 196545667. The next prime is 196545703.

It is a happy number.

196545691 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 196545691 - 2⁵ = 196545659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (196545191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48420 + ... + 52321.

It is an arithmetic number, because the mean of its divisors is an integer number (49162096).

Almost surely, 2^196545691 is an apocalyptic number.

196545691 is a deficient number, since it is larger than the sum of its proper divisors (102693).

196545691 is a wasteful number, since it uses less digits than its factorization.

196545691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102692.

The product of its digits is 291600, while the sum is 46.

The square root of 196545691 is about 14019.4754181460. The cubic root of 196545691 is about 581.4171558250.

The spelling of 196545691 in words is "one hundred ninety-six million, five hundred forty-five thousand, six hundred ninety-one".