196721 has 8 divisors (see below), whose sum is σ = 227520. Its totient is φ = 166608.

The previous prime is 196717. The next prime is 196727. The reversal of 196721 is 127691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 196721 - 2² = 196717 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (196727) 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, 1010 + ... + 1188.

It is an arithmetic number, because the mean of its divisors is an integer number (28440).

2¹⁹⁶⁷²¹ is an apocalyptic number.

It is an amenable number.

196721 is a deficient number, since it is larger than the sum of its proper divisors (30799).

196721 is a wasteful number, since it uses less digits than its factorization.

196721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343.

The product of its digits is 756, while the sum is 26.

The square root of 196721 is about 443.5324114425. The cubic root of 196721 is about 58.1589969535.

The spelling of 196721 in words is "one hundred ninety-six thousand, seven hundred twenty-one".