208893397 has 2 divisors, whose sum is σ = 208893398. Its totient is φ = 208893396.

The previous prime is 208893361. The next prime is 208893439. The reversal of 208893397 is 793398802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203176516 + 5716881 = 14254^2 + 2391^2 .

It is a cyclic number.

It is not a de Polignac number, because 208893397 - 2²⁷ = 74675669 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 208893397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208893197) 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, 104446698 + 104446699.

It is an arithmetic number, because the mean of its divisors is an integer number (104446699).

Almost surely, 2^208893397 is an apocalyptic number.

It is an amenable number.

208893397 is a deficient number, since it is larger than the sum of its proper divisors (1).

208893397 is an equidigital number, since it uses as much as digits as its factorization.

208893397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 49.

The square root of 208893397 is about 14453.1448826890. The cubic root of 208893397 is about 593.3462985496.

The spelling of 208893397 in words is "two hundred eight million, eight hundred ninety-three thousand, three hundred ninety-seven".