213905459 has 2 divisors, whose sum is σ = 213905460. Its totient is φ = 213905458.

The previous prime is 213905411. The next prime is 213905491. The reversal of 213905459 is 954509312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213905459 is a prime.

It is not a weakly prime, because it can be changed into another prime (213905759) 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, 106952729 + 106952730.

It is an arithmetic number, because the mean of its divisors is an integer number (106952730).

Almost surely, 2^213905459 is an apocalyptic number.

213905459 is a deficient number, since it is larger than the sum of its proper divisors (1).

213905459 is an equidigital number, since it uses as much as digits as its factorization.

213905459 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 213905459 is about 14625.5071365064. The cubic root of 213905459 is about 598.0543074731.

The spelling of 213905459 in words is "two hundred thirteen million, nine hundred five thousand, four hundred fifty-nine".