196236591 has 16 divisors (see below), whose sum is σ = 273080160. Its totient is φ = 125189120.

The previous prime is 196236589. The next prime is 196236613. The reversal of 196236591 is 195632691.

It is a cyclic number.

It is not a de Polignac number, because 196236591 - 2¹ = 196236589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196236571) 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, 150 + ... + 19811.

It is an arithmetic number, because the mean of its divisors is an integer number (17067510).

Almost surely, 2^196236591 is an apocalyptic number.

196236591 is a deficient number, since it is larger than the sum of its proper divisors (76843569).

196236591 is a wasteful number, since it uses less digits than its factorization.

196236591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20106.

The product of its digits is 87480, while the sum is 42.

The square root of 196236591 is about 14008.4471302140. The cubic root of 196236591 is about 581.1122049588.

The spelling of 196236591 in words is "one hundred ninety-six million, two hundred thirty-six thousand, five hundred ninety-one".