208250813 has 2 divisors, whose sum is σ = 208250814. Its totient is φ = 208250812.

The previous prime is 208250803. The next prime is 208250857. The reversal of 208250813 is 318052802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169338169 + 38912644 = 13013^2 + 6238^2 .

It is a cyclic number.

It is not a de Polignac number, because 208250813 - 2²² = 204056509 is a prime.

It is a super-2 number, since 2×208250813² = 86736802230321938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208250803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104125406 + 104125407.

It is an arithmetic number, because the mean of its divisors is an integer number (104125407).

Almost surely, 2^208250813 is an apocalyptic number.

It is an amenable number.

208250813 is a deficient number, since it is larger than the sum of its proper divisors (1).

208250813 is an equidigital number, since it uses as much as digits as its factorization.

208250813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 208250813 is about 14430.8978584148. The cubic root of 208250813 is about 592.7372694728.

The spelling of 208250813 in words is "two hundred eight million, two hundred fifty thousand, eight hundred thirteen".