216701839 has 4 divisors (see below), whose sum is σ = 229449024. Its totient is φ = 203954656.

The previous prime is 216701813. The next prime is 216701899. The reversal of 216701839 is 938107612.

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 216701839 - 2²⁵ = 183147407 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 216701798 and 216701807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216701899) 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, 6373567 + ... + 6373600.

It is an arithmetic number, because the mean of its divisors is an integer number (57362256).

Almost surely, 2^216701839 is an apocalyptic number.

216701839 is a deficient number, since it is larger than the sum of its proper divisors (12747185).

216701839 is a wasteful number, since it uses less digits than its factorization.

216701839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12747184.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 216701839 is about 14720.7961401549. The cubic root of 216701839 is about 600.6491483500.

The spelling of 216701839 in words is "two hundred sixteen million, seven hundred one thousand, eight hundred thirty-nine".