213676447 has 4 divisors (see below), whose sum is σ = 213893056. Its totient is φ = 213459840.

The previous prime is 213676409. The next prime is 213676453. The reversal of 213676447 is 744676312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213676447 - 2⁷ = 213676319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213626447) 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 in 3 ways as a sum of consecutive naturals, for example, 106818 + ... + 108799.

It is an arithmetic number, because the mean of its divisors is an integer number (53473264).

Almost surely, 2^213676447 is an apocalyptic number.

213676447 is a deficient number, since it is larger than the sum of its proper divisors (216609).

213676447 is an equidigital number, since it uses as much as digits as its factorization.

213676447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216608.

The product of its digits is 169344, while the sum is 40.

The square root of 213676447 is about 14617.6758412547. The cubic root of 213676447 is about 597.8408011249.

The spelling of 213676447 in words is "two hundred thirteen million, six hundred seventy-six thousand, four hundred forty-seven".