810423253 has 2 divisors, whose sum is σ = 810423254. Its totient is φ = 810423252.

The previous prime is 810423227. The next prime is 810423287. The reversal of 810423253 is 352324018.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 650097009 + 160326244 = 25497^2 + 12662^2 .

It is a cyclic number.

It is not a de Polignac number, because 810423253 - 2⁵ = 810423221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (810423953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405211626 + 405211627.

It is an arithmetic number, because the mean of its divisors is an integer number (405211627).

Almost surely, 2^810423253 is an apocalyptic number.

It is an amenable number.

810423253 is a deficient number, since it is larger than the sum of its proper divisors (1).

810423253 is an equidigital number, since it uses as much as digits as its factorization.

810423253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 810423253 is about 28467.9337676622. The cubic root of 810423253 is about 932.3320871536.

The spelling of 810423253 in words is "eight hundred ten million, four hundred twenty-three thousand, two hundred fifty-three".