811928801 has 2 divisors, whose sum is σ = 811928802. Its totient is φ = 811928800.

The previous prime is 811928791. The next prime is 811928839. The reversal of 811928801 is 108829118.

It is a happy number.

It is an a-pointer prime, because the next prime (811928839) can be obtained adding 811928801 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 809971600 + 1957201 = 28460^2 + 1399^2 .

It is a cyclic number.

It is not a de Polignac number, because 811928801 - 2¹⁰ = 811927777 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (811928861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405964400 + 405964401.

It is an arithmetic number, because the mean of its divisors is an integer number (405964401).

Almost surely, 2^811928801 is an apocalyptic number.

It is an amenable number.

811928801 is a deficient number, since it is larger than the sum of its proper divisors (1).

811928801 is an equidigital number, since it uses as much as digits as its factorization.

811928801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 38.

The square root of 811928801 is about 28494.3643726264. The cubic root of 811928801 is about 932.9090705945.

The spelling of 811928801 in words is "eight hundred eleven million, nine hundred twenty-eight thousand, eight hundred one".