811627697 has 2 divisors, whose sum is σ = 811627698. Its totient is φ = 811627696.

The previous prime is 811627673. The next prime is 811627699. The reversal of 811627697 is 796726118.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 435306496 + 376321201 = 20864^2 + 19399^2 .

It is a cyclic number.

It is not a de Polignac number, because 811627697 - 2⁶ = 811627633 is a prime.

Together with 811627699, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (811627699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405813848 + 405813849.

It is an arithmetic number, because the mean of its divisors is an integer number (405813849).

Almost surely, 2^811627697 is an apocalyptic number.

It is an amenable number.

811627697 is a deficient number, since it is larger than the sum of its proper divisors (1).

811627697 is an equidigital number, since it uses as much as digits as its factorization.

811627697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 47.

The square root of 811627697 is about 28489.0803115861. The cubic root of 811627697 is about 932.7937331479.

The spelling of 811627697 in words is "eight hundred eleven million, six hundred twenty-seven thousand, six hundred ninety-seven".