816111029 has 4 divisors (see below), whose sum is σ = 825943776. Its totient is φ = 806278284.

The previous prime is 816110947. The next prime is 816111031. The reversal of 816111029 is 920111618.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 816111029 - 2²⁰ = 815062453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 816110992 and 816111010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816111089) 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, 4916249 + ... + 4916414.

It is an arithmetic number, because the mean of its divisors is an integer number (206485944).

Almost surely, 2^816111029 is an apocalyptic number.

It is an amenable number.

816111029 is a deficient number, since it is larger than the sum of its proper divisors (9832747).

816111029 is an equidigital number, since it uses as much as digits as its factorization.

816111029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9832746.

The product of its (nonzero) digits is 864, while the sum is 29.

The square root of 816111029 is about 28567.6570442870. The cubic root of 816111029 is about 934.5081264276.

The spelling of 816111029 in words is "eight hundred sixteen million, one hundred eleven thousand, twenty-nine".