810930641 has 2 divisors, whose sum is σ = 810930642. Its totient is φ = 810930640.

The previous prime is 810930623. The next prime is 810930649. The reversal of 810930641 is 146039018.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 475894225 + 335036416 = 21815^2 + 18304^2 .

It is a cyclic number.

It is not a de Polignac number, because 810930641 - 2⁶ = 810930577 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 810930598 and 810930607.

It is not a weakly prime, because it can be changed into another prime (810930649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405465320 + 405465321.

It is an arithmetic number, because the mean of its divisors is an integer number (405465321).

Almost surely, 2^810930641 is an apocalyptic number.

It is an amenable number.

810930641 is a deficient number, since it is larger than the sum of its proper divisors (1).

810930641 is an equidigital number, since it uses as much as digits as its factorization.

810930641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 810930641 is about 28476.8439438081. The cubic root of 810930641 is about 932.5266173668.

Adding to 810930641 its reverse (146039018), we get a palindrome (956969659).

The spelling of 810930641 in words is "eight hundred ten million, nine hundred thirty thousand, six hundred forty-one".