811925113 has 2 divisors, whose sum is σ = 811925114. Its totient is φ = 811925112.

The previous prime is 811925099. The next prime is 811925131. The reversal of 811925113 is 311529118.

Together with next prime (811925131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 676156009 + 135769104 = 26003^2 + 11652^2 .

It is a cyclic number.

It is not a de Polignac number, because 811925113 - 2⁹ = 811924601 is a prime.

It is not a weakly prime, because it can be changed into another prime (811925813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405962556 + 405962557.

It is an arithmetic number, because the mean of its divisors is an integer number (405962557).

Almost surely, 2^811925113 is an apocalyptic number.

It is an amenable number.

811925113 is a deficient number, since it is larger than the sum of its proper divisors (1).

811925113 is an equidigital number, since it uses as much as digits as its factorization.

811925113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 31.

The square root of 811925113 is about 28494.2996580018. The cubic root of 811925113 is about 932.9076580840.

The spelling of 811925113 in words is "eight hundred eleven million, nine hundred twenty-five thousand, one hundred thirteen".