196701581 has 2 divisors, whose sum is σ = 196701582. Its totient is φ = 196701580.

The previous prime is 196701539. The next prime is 196701601. The reversal of 196701581 is 185107691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146773225 + 49928356 = 12115^2 + 7066^2 .

It is an emirp because it is prime and its reverse (185107691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 196701581 - 2¹⁴ = 196685197 is a prime.

It is a super-2 number, since 2×196701581² = 77383023935799122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196701511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98350790 + 98350791.

It is an arithmetic number, because the mean of its divisors is an integer number (98350791).

Almost surely, 2^196701581 is an apocalyptic number.

It is an amenable number.

196701581 is a deficient number, since it is larger than the sum of its proper divisors (1).

196701581 is an equidigital number, since it uses as much as digits as its factorization.

196701581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 38.

The square root of 196701581 is about 14025.0340819550. The cubic root of 196701581 is about 581.5708319967.

The spelling of 196701581 in words is "one hundred ninety-six million, seven hundred one thousand, five hundred eighty-one".