196939871 has 16 divisors (see below), whose sum is σ = 205970688. Its totient is φ = 188160000.

The previous prime is 196939859. The next prime is 196939879. The reversal of 196939871 is 178939691.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196939871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196939879) 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, 766175 + ... + 766431.

It is an arithmetic number, because the mean of its divisors is an integer number (12873168).

Almost surely, 2^196939871 is an apocalyptic number.

196939871 is a deficient number, since it is larger than the sum of its proper divisors (9030817).

196939871 is a wasteful number, since it uses less digits than its factorization.

196939871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622.

The product of its digits is 734832, while the sum is 53.

The square root of 196939871 is about 14033.5266772113. The cubic root of 196939871 is about 581.8055811524.

The spelling of 196939871 in words is "one hundred ninety-six million, nine hundred thirty-nine thousand, eight hundred seventy-one".