208396231 has 2 divisors, whose sum is σ = 208396232. Its totient is φ = 208396230.

The previous prime is 208396213. The next prime is 208396249. The reversal of 208396231 is 132693802.

It is a happy number.

Together with previous prime (208396213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (208396213) and next prime (208396249).

It is a cyclic number.

It is not a de Polignac number, because 208396231 - 2¹³ = 208388039 is a prime.

It is a super-2 number, since 2×208396231² = 86857978190010722, which contains 22 as substring.

It is equal to p_11517739 and since 208396231 and 11517739 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208396271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104198115 + 104198116.

It is an arithmetic number, because the mean of its divisors is an integer number (104198116).

Almost surely, 2^208396231 is an apocalyptic number.

208396231 is a deficient number, since it is larger than the sum of its proper divisors (1).

208396231 is an equidigital number, since it uses as much as digits as its factorization.

208396231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 208396231 is about 14435.9354043997. The cubic root of 208396231 is about 592.8752034894.

The spelling of 208396231 in words is "two hundred eight million, three hundred ninety-six thousand, two hundred thirty-one".