811649459 has 2 divisors, whose sum is σ = 811649460. Its totient is φ = 811649458.

The previous prime is 811649437. The next prime is 811649483. The reversal of 811649459 is 954946118.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 811649459 - 2⁸ = 811649203 is a prime.

It is not a weakly prime, because it can be changed into another prime (811649159) 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, 405824729 + 405824730.

It is an arithmetic number, because the mean of its divisors is an integer number (405824730).

Almost surely, 2^811649459 is an apocalyptic number.

811649459 is a deficient number, since it is larger than the sum of its proper divisors (1).

811649459 is an equidigital number, since it uses as much as digits as its factorization.

811649459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 47.

The square root of 811649459 is about 28489.4622448371. The cubic root of 811649459 is about 932.8020700064.

It can be divided in two parts, 8116 and 49459, that added together give a palindrome (57575).

The spelling of 811649459 in words is "eight hundred eleven million, six hundred forty-nine thousand, four hundred fifty-nine".