196898521 has 2 divisors, whose sum is σ = 196898522. Its totient is φ = 196898520.

The previous prime is 196898509. The next prime is 196898543. The reversal of 196898521 is 125898691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165482496 + 31416025 = 12864^2 + 5605^2 .

It is a cyclic number.

It is not a de Polignac number, because 196898521 - 2⁵ = 196898489 is a prime.

It is not a weakly prime, because it can be changed into another prime (196896521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98449260 + 98449261.

It is an arithmetic number, because the mean of its divisors is an integer number (98449261).

Almost surely, 2^196898521 is an apocalyptic number.

It is an amenable number.

196898521 is a deficient number, since it is larger than the sum of its proper divisors (1).

196898521 is an equidigital number, since it uses as much as digits as its factorization.

196898521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 49.

The square root of 196898521 is about 14032.0533422589. The cubic root of 196898521 is about 581.7648591720.

It can be divided in two parts, 1968 and 98521, that added together give a square (100489 = 317²).

The spelling of 196898521 in words is "one hundred ninety-six million, eight hundred ninety-eight thousand, five hundred twenty-one".