196182721 has 6 divisors (see below), whose sum is σ = 228212610. Its totient is φ = 168156576.

The previous prime is 196182719. The next prime is 196182731. The reversal of 196182721 is 127281691.

It can be written as a sum of positive squares in only one way, i.e., 193071025 + 3111696 = 13895^2 + 1764^2 .

It is not a de Polignac number, because 196182721 - 2¹ = 196182719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (196182731) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2001816 + ... + 2001913.

It is an arithmetic number, because the mean of its divisors is an integer number (38035435).

Almost surely, 2^196182721 is an apocalyptic number.

It is an amenable number.

196182721 is a deficient number, since it is larger than the sum of its proper divisors (32029889).

196182721 is an equidigital number, since it uses as much as digits as its factorization.

196182721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4003743 (or 4003736 counting only the distinct ones).

The product of its digits is 12096, while the sum is 37.

The square root of 196182721 is about 14006.5242298009. The cubic root of 196182721 is about 581.0590253092.

The spelling of 196182721 in words is "one hundred ninety-six million, one hundred eighty-two thousand, seven hundred twenty-one".