196893661 has 2 divisors, whose sum is σ = 196893662. Its totient is φ = 196893660.

The previous prime is 196893659. The next prime is 196893703. The reversal of 196893661 is 166398691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 181440900 + 15452761 = 13470^2 + 3931^2 .

It is a cyclic number.

It is not a de Polignac number, because 196893661 - 2¹ = 196893659 is a prime.

It is a super-2 number, since 2×196893661² = 77534227483965842, which contains 22 as substring.

Together with 196893659, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196893601) 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, 98446830 + 98446831.

It is an arithmetic number, because the mean of its divisors is an integer number (98446831).

Almost surely, 2^196893661 is an apocalyptic number.

It is an amenable number.

196893661 is a deficient number, since it is larger than the sum of its proper divisors (1).

196893661 is an equidigital number, since it uses as much as digits as its factorization.

196893661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 49.

The square root of 196893661 is about 14031.8801662500. The cubic root of 196893661 is about 581.7600726108.

The spelling of 196893661 in words is "one hundred ninety-six million, eight hundred ninety-three thousand, six hundred sixty-one".