196605511 has 2 divisors, whose sum is σ = 196605512. Its totient is φ = 196605510.

The previous prime is 196605491. The next prime is 196605533. The reversal of 196605511 is 115506691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 196605511 - 2²¹ = 194508359 is a prime.

It is a super-2 number, since 2×196605511² = 77307453911142242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196605551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98302755 + 98302756.

It is an arithmetic number, because the mean of its divisors is an integer number (98302756).

Almost surely, 2^196605511 is an apocalyptic number.

196605511 is a deficient number, since it is larger than the sum of its proper divisors (1).

196605511 is an equidigital number, since it uses as much as digits as its factorization.

196605511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8100, while the sum is 34.

The square root of 196605511 is about 14021.6087165489. The cubic root of 196605511 is about 581.4761359128.

The spelling of 196605511 in words is "one hundred ninety-six million, six hundred five thousand, five hundred eleven".