213689459 has 2 divisors, whose sum is σ = 213689460. Its totient is φ = 213689458.

The previous prime is 213689453. The next prime is 213689461. The reversal of 213689459 is 954986312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213689459 is a prime.

Together with 213689461, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213689453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106844729 + 106844730.

It is an arithmetic number, because the mean of its divisors is an integer number (106844730).

Almost surely, 2^213689459 is an apocalyptic number.

213689459 is a deficient number, since it is larger than the sum of its proper divisors (1).

213689459 is an equidigital number, since it uses as much as digits as its factorization.

213689459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 47.

The square root of 213689459 is about 14618.1209120735. The cubic root of 213689459 is about 597.8529362115.

The spelling of 213689459 in words is "two hundred thirteen million, six hundred eighty-nine thousand, four hundred fifty-nine".