208958641 has 2 divisors, whose sum is σ = 208958642. Its totient is φ = 208958640.

The previous prime is 208958639. The next prime is 208958671. The reversal of 208958641 is 146859802.

It is a happy number.

208958641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133633600 + 75325041 = 11560^2 + 8679^2 .

It is a cyclic number.

It is not a de Polignac number, because 208958641 - 2¹ = 208958639 is a prime.

Together with 208958639, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (208958621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104479320 + 104479321.

It is an arithmetic number, because the mean of its divisors is an integer number (104479321).

Almost surely, 2^208958641 is an apocalyptic number.

It is an amenable number.

208958641 is a deficient number, since it is larger than the sum of its proper divisors (1).

208958641 is an equidigital number, since it uses as much as digits as its factorization.

208958641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 208958641 is about 14455.4017931014. The cubic root of 208958641 is about 593.4080657106.

The spelling of 208958641 in words is "two hundred eight million, nine hundred fifty-eight thousand, six hundred forty-one".