196711621 has 4 divisors (see below), whose sum is σ = 197239372. Its totient is φ = 196183872.

The previous prime is 196711609. The next prime is 196711657. The reversal of 196711621 is 126117691.

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

It can be written as a sum of positive squares in 2 ways, for example, as 32615521 + 164096100 = 5711^2 + 12810^2 .

It is a cyclic number.

It is not a de Polignac number, because 196711621 - 2¹¹ = 196709573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196711601) 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, 263316 + ... + 264061.

It is an arithmetic number, because the mean of its divisors is an integer number (49309843).

Almost surely, 2^196711621 is an apocalyptic number.

It is an amenable number.

196711621 is a deficient number, since it is larger than the sum of its proper divisors (527751).

196711621 is an equidigital number, since it uses as much as digits as its factorization.

196711621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527750.

The product of its digits is 4536, while the sum is 34.

The square root of 196711621 is about 14025.3920087818. The cubic root of 196711621 is about 581.5807266330.

The spelling of 196711621 in words is "one hundred ninety-six million, seven hundred eleven thousand, six hundred twenty-one".