213634004 has 12 divisors (see below), whose sum is σ = 383964084. Its totient is φ = 103929984.

The previous prime is 213633997. The next prime is 213634007. The reversal of 213634004 is 400436312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 94867600 + 118766404 = 9740^2 + 10898^2 .

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213634007) 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, 721589 + ... + 721884.

It is an arithmetic number, because the mean of its divisors is an integer number (31997007).

Almost surely, 2^213634004 is an apocalyptic number.

It is an amenable number.

213634004 is a deficient number, since it is larger than the sum of its proper divisors (170330080).

213634004 is a wasteful number, since it uses less digits than its factorization.

213634004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1443514 (or 1443512 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 213634004 is about 14616.2239993782. The cubic root of 213634004 is about 597.8012150471.

The spelling of 213634004 in words is "two hundred thirteen million, six hundred thirty-four thousand, four".