216702439 has 8 divisors (see below), whose sum is σ = 221050832. Its totient is φ = 212379840.

The previous prime is 216702403. The next prime is 216702461. The reversal of 216702439 is 934207612.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216702439 is a prime.

It is a Duffinian number.

216702439 is a modest number, since divided by 2439 gives 2167 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216702539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10987 + ... + 23539.

It is an arithmetic number, because the mean of its divisors is an integer number (27631354).

Almost surely, 2^216702439 is an apocalyptic number.

216702439 is a deficient number, since it is larger than the sum of its proper divisors (4348393).

216702439 is a wasteful number, since it uses less digits than its factorization.

216702439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12897.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 216702439 is about 14720.8165194734. The cubic root of 216702439 is about 600.6497027049.

The spelling of 216702439 in words is "two hundred sixteen million, seven hundred two thousand, four hundred thirty-nine".