816001099 has 2 divisors, whose sum is σ = 816001100. Its totient is φ = 816001098.

The previous prime is 816001097. The next prime is 816001103. The reversal of 816001099 is 990100618.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 816001099 - 2¹ = 816001097 is a prime.

Together with 816001097, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (816001097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408000549 + 408000550.

It is an arithmetic number, because the mean of its divisors is an integer number (408000550).

Almost surely, 2^816001099 is an apocalyptic number.

816001099 is a deficient number, since it is larger than the sum of its proper divisors (1).

816001099 is an equidigital number, since it uses as much as digits as its factorization.

816001099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 816001099 is about 28565.7329505126. The cubic root of 816001099 is about 934.4661651880.

The spelling of 816001099 in words is "eight hundred sixteen million, one thousand, ninety-nine".