213894659 has 4 divisors (see below), whose sum is σ = 233339640. Its totient is φ = 194449680.

The previous prime is 213894643. The next prime is 213894661. The reversal of 213894659 is 956498312.

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 213894659 - 2⁴ = 213894643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213894059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9722474 + ... + 9722495.

It is an arithmetic number, because the mean of its divisors is an integer number (58334910).

Almost surely, 2^213894659 is an apocalyptic number.

213894659 is a deficient number, since it is larger than the sum of its proper divisors (19444981).

213894659 is a wasteful number, since it uses less digits than its factorization.

213894659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19444980.

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

The square root of 213894659 is about 14625.1379138796. The cubic root of 213894659 is about 598.0442421304.

The spelling of 213894659 in words is "two hundred thirteen million, eight hundred ninety-four thousand, six hundred fifty-nine".