213906634 has 8 divisors (see below), whose sum is σ = 331210368. Its totient is φ = 103503180.

The previous prime is 213906629. The next prime is 213906643. The reversal of 213906634 is 436609312.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 213906634.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1724992 + ... + 1725115.

It is an arithmetic number, because the mean of its divisors is an integer number (41401296).

Almost surely, 2^213906634 is an apocalyptic number.

213906634 is a deficient number, since it is larger than the sum of its proper divisors (117303734).

213906634 is a wasteful number, since it uses less digits than its factorization.

213906634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3450140.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 213906634 is about 14625.5473059985. The cubic root of 213906634 is about 598.0554025246.

The spelling of 213906634 in words is "two hundred thirteen million, nine hundred six thousand, six hundred thirty-four".