213439684 has 12 divisors (see below), whose sum is σ = 373687804. Its totient is φ = 106671744.

The previous prime is 213439651. The next prime is 213439687. The reversal of 213439684 is 486934312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 170824900 + 42614784 = 13070^2 + 6528^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (213439687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 897 + ... + 20680.

Almost surely, 2^213439684 is an apocalyptic number.

It is an amenable number.

213439684 is a deficient number, since it is larger than the sum of its proper divisors (160248120).

213439684 is a wasteful number, since it uses less digits than its factorization.

213439684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24054 (or 24052 counting only the distinct ones).

The product of its digits is 124416, while the sum is 40.

The square root of 213439684 is about 14609.5750793786. The cubic root of 213439684 is about 597.6199081256.

The spelling of 213439684 in words is "two hundred thirteen million, four hundred thirty-nine thousand, six hundred eighty-four".