196340621 has 2 divisors, whose sum is σ = 196340622. Its totient is φ = 196340620.

The previous prime is 196340597. The next prime is 196340629. The reversal of 196340621 is 126043691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194295721 + 2044900 = 13939^2 + 1430^2 .

It is an emirp because it is prime and its reverse (126043691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 196340621 - 2¹⁴ = 196324237 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196340629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98170310 + 98170311.

It is an arithmetic number, because the mean of its divisors is an integer number (98170311).

Almost surely, 2^196340621 is an apocalyptic number.

It is an amenable number.

196340621 is a deficient number, since it is larger than the sum of its proper divisors (1).

196340621 is an equidigital number, since it uses as much as digits as its factorization.

196340621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 196340621 is about 14012.1597550128. The cubic root of 196340621 is about 581.2148742638.

The spelling of 196340621 in words is "one hundred ninety-six million, three hundred forty thousand, six hundred twenty-one".