213463639 has 2 divisors, whose sum is σ = 213463640. Its totient is φ = 213463638.

The previous prime is 213463631. The next prime is 213463661. The reversal of 213463639 is 936364312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213463639 - 2³ = 213463631 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 213463598 and 213463607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213463631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106731819 + 106731820.

It is an arithmetic number, because the mean of its divisors is an integer number (106731820).

Almost surely, 2^213463639 is an apocalyptic number.

213463639 is a deficient number, since it is larger than the sum of its proper divisors (1).

213463639 is an equidigital number, since it uses as much as digits as its factorization.

213463639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 37.

The square root of 213463639 is about 14610.3948954161. The cubic root of 213463639 is about 597.6422648700.

The spelling of 213463639 in words is "two hundred thirteen million, four hundred sixty-three thousand, six hundred thirty-nine".