816143827 has 16 divisors (see below), whose sum is σ = 869631840. Its totient is φ = 764870400.

The previous prime is 816143821. The next prime is 816143831. The reversal of 816143827 is 728341618.

It is a cyclic number.

It is not a de Polignac number, because 816143827 - 2²³ = 807755219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 816143827.

It is not an unprimeable number, because it can be changed into a prime (816143821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103749 + ... + 111337.

It is an arithmetic number, because the mean of its divisors is an integer number (54351990).

Almost surely, 2^816143827 is an apocalyptic number.

816143827 is a deficient number, since it is larger than the sum of its proper divisors (53488013).

816143827 is a wasteful number, since it uses less digits than its factorization.

816143827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7734.

The product of its digits is 64512, while the sum is 40.

The square root of 816143827 is about 28568.2310792951. The cubic root of 816143827 is about 934.5206449803.

The spelling of 816143827 in words is "eight hundred sixteen million, one hundred forty-three thousand, eight hundred twenty-seven".