16213439 has 4 divisors (see below), whose sum is σ = 17687400. Its totient is φ = 14739480.

The previous prime is 16213433. The next prime is 16213481. The reversal of 16213439 is 93431261.

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 16213439 - 2¹² = 16209343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16213433) 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, 736964 + ... + 736985.

It is an arithmetic number, because the mean of its divisors is an integer number (4421850).

Almost surely, 2^16213439 is an apocalyptic number.

16213439 is a deficient number, since it is larger than the sum of its proper divisors (1473961).

16213439 is a wasteful number, since it uses less digits than its factorization.

16213439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1473960.

The product of its digits is 3888, while the sum is 29.

The square root of 16213439 is about 4026.5914866050. The cubic root of 16213439 is about 253.0997487182.

The spelling of 16213439 in words is "sixteen million, two hundred thirteen thousand, four hundred thirty-nine".