206537473 has 2 divisors, whose sum is σ = 206537474. Its totient is φ = 206537472.

The previous prime is 206537423. The next prime is 206537489. The reversal of 206537473 is 374735602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151954929 + 54582544 = 12327^2 + 7388^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206537473 is a prime.

It is not a weakly prime, because it can be changed into another prime (206537413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103268736 + 103268737.

It is an arithmetic number, because the mean of its divisors is an integer number (103268737).

Almost surely, 2^206537473 is an apocalyptic number.

It is an amenable number.

206537473 is a deficient number, since it is larger than the sum of its proper divisors (1).

206537473 is an equidigital number, since it uses as much as digits as its factorization.

206537473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105840, while the sum is 37.

The square root of 206537473 is about 14371.4116564797. The cubic root of 206537473 is about 591.1072504226.

The spelling of 206537473 in words is "two hundred six million, five hundred thirty-seven thousand, four hundred seventy-three".