816620027 has 2 divisors, whose sum is σ = 816620028. Its totient is φ = 816620026.

The previous prime is 816620023. The next prime is 816620029. The reversal of 816620027 is 720026618.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 816620027 - 2² = 816620023 is a prime.

Together with 816620029, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 816619975 and 816620002.

It is not a weakly prime, because it can be changed into another prime (816620023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408310013 + 408310014.

It is an arithmetic number, because the mean of its divisors is an integer number (408310014).

Almost surely, 2^816620027 is an apocalyptic number.

816620027 is a deficient number, since it is larger than the sum of its proper divisors (1).

816620027 is an equidigital number, since it uses as much as digits as its factorization.

816620027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 816620027 is about 28576.5642966400. The cubic root of 816620027 is about 934.7023663028.

The spelling of 816620027 in words is "eight hundred sixteen million, six hundred twenty thousand, twenty-seven".