811752089 has 2 divisors, whose sum is σ = 811752090. Its totient is φ = 811752088.

The previous prime is 811751999. The next prime is 811752107. The reversal of 811752089 is 980257118.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 619014400 + 192737689 = 24880^2 + 13883^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-811752089 is a prime.

It is not a weakly prime, because it can be changed into another prime (811752589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405876044 + 405876045.

It is an arithmetic number, because the mean of its divisors is an integer number (405876045).

Almost surely, 2^811752089 is an apocalyptic number.

It is an amenable number.

811752089 is a deficient number, since it is larger than the sum of its proper divisors (1).

811752089 is an equidigital number, since it uses as much as digits as its factorization.

811752089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 41.

The square root of 811752089 is about 28491.2633802013. The cubic root of 811752089 is about 932.8413847790.

It can be divided in two parts, 8117 and 52089, that added together give a palindrome (60206).

The spelling of 811752089 in words is "eight hundred eleven million, seven hundred fifty-two thousand, eighty-nine".