213123659 has 8 divisors (see below), whose sum is σ = 244635360. Its totient is φ = 181878336.

The previous prime is 213123643. The next prime is 213123787. The reversal of 213123659 is 956321312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213123659 - 2⁴ = 213123643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213120659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64874 + ... + 68079.

It is an arithmetic number, because the mean of its divisors is an integer number (30579420).

Almost surely, 2^213123659 is an apocalyptic number.

213123659 is a deficient number, since it is larger than the sum of its proper divisors (31511701).

213123659 is a wasteful number, since it uses less digits than its factorization.

213123659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133189.

The product of its digits is 9720, while the sum is 32.

The square root of 213123659 is about 14598.7553921559. The cubic root of 213123659 is about 597.3248112992.

The spelling of 213123659 in words is "two hundred thirteen million, one hundred twenty-three thousand, six hundred fifty-nine".