196001989 has 2 divisors, whose sum is σ = 196001990. Its totient is φ = 196001988.

The previous prime is 196001917. The next prime is 196002011. The reversal of 196001989 is 989100691.

196001989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194602500 + 1399489 = 13950^2 + 1183^2 .

It is a cyclic number.

It is not a de Polignac number, because 196001989 - 2¹⁹ = 195477701 is a prime.

It is a super-2 number, since 2×196001989² = 76833559383912242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196001089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98000994 + 98000995.

It is an arithmetic number, because the mean of its divisors is an integer number (98000995).

Almost surely, 2^196001989 is an apocalyptic number.

It is an amenable number.

196001989 is a deficient number, since it is larger than the sum of its proper divisors (1).

196001989 is an equidigital number, since it uses as much as digits as its factorization.

196001989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 43.

The square root of 196001989 is about 14000.0710355341. The cubic root of 196001989 is about 580.8805382604.

The spelling of 196001989 in words is "one hundred ninety-six million, one thousand, nine hundred eighty-nine".