216836739 has 24 divisors (see below), whose sum is σ = 358525440. Its totient is φ = 123708528.

The previous prime is 216836729. The next prime is 216836743. The reversal of 216836739 is 937638612.

216836739 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216836739 - 2⁷ = 216836611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216836694 and 216836703.

It is not an unprimeable number, because it can be changed into a prime (216836729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42904 + ... + 47690.

It is an arithmetic number, because the mean of its divisors is an integer number (14938560).

Almost surely, 2^216836739 is an apocalyptic number.

216836739 is a deficient number, since it is larger than the sum of its proper divisors (141688701).

216836739 is a wasteful number, since it uses less digits than its factorization.

216836739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5519 (or 5516 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 216836739 is about 14725.3773805631. The cubic root of 216836739 is about 600.7737600633.

The spelling of 216836739 in words is "two hundred sixteen million, eight hundred thirty-six thousand, seven hundred thirty-nine".