196581719 has 2 divisors, whose sum is σ = 196581720. Its totient is φ = 196581718.

The previous prime is 196581709. The next prime is 196581731. The reversal of 196581719 is 917185691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 196581719 - 2²⁴ = 179804503 is a prime.

It is a super-2 number, since 2×196581719² = 77288744489989922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196581709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98290859 + 98290860.

It is an arithmetic number, because the mean of its divisors is an integer number (98290860).

Almost surely, 2^196581719 is an apocalyptic number.

196581719 is a deficient number, since it is larger than the sum of its proper divisors (1).

196581719 is an equidigital number, since it uses as much as digits as its factorization.

196581719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 47.

The square root of 196581719 is about 14020.7602860901. The cubic root of 196581719 is about 581.4526794012.

The spelling of 196581719 in words is "one hundred ninety-six million, five hundred eighty-one thousand, seven hundred nineteen".