213669439 has 4 divisors (see below), whose sum is σ = 215785080. Its totient is φ = 211553800.

The previous prime is 213669433. The next prime is 213669527. The reversal of 213669439 is 934966312.

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 213669439 - 2¹³ = 213661247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213669395 and 213669404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213669433) 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, 1057669 + ... + 1057870.

It is an arithmetic number, because the mean of its divisors is an integer number (53946270).

Almost surely, 2^213669439 is an apocalyptic number.

213669439 is a deficient number, since it is larger than the sum of its proper divisors (2115641).

213669439 is a wasteful number, since it uses less digits than its factorization.

213669439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2115640.

The product of its digits is 209952, while the sum is 43.

The square root of 213669439 is about 14617.4361294996. The cubic root of 213669439 is about 597.8342652086.

The spelling of 213669439 in words is "two hundred thirteen million, six hundred sixty-nine thousand, four hundred thirty-nine".