208716953 has 2 divisors, whose sum is σ = 208716954. Its totient is φ = 208716952.

The previous prime is 208716941. The next prime is 208716961. The reversal of 208716953 is 359617802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152571904 + 56145049 = 12352^2 + 7493^2 .

It is a cyclic number.

It is not a de Polignac number, because 208716953 - 2¹² = 208712857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 208716953.

It is not a weakly prime, because it can be changed into another prime (208716913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104358476 + 104358477.

It is an arithmetic number, because the mean of its divisors is an integer number (104358477).

Almost surely, 2^208716953 is an apocalyptic number.

It is an amenable number.

208716953 is a deficient number, since it is larger than the sum of its proper divisors (1).

208716953 is an equidigital number, since it uses as much as digits as its factorization.

208716953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 208716953 is about 14447.0395929408. The cubic root of 208716953 is about 593.1791927656.

The spelling of 208716953 in words is "two hundred eight million, seven hundred sixteen thousand, nine hundred fifty-three".