813450917 has 2 divisors, whose sum is σ = 813450918. Its totient is φ = 813450916.

The previous prime is 813450893. The next prime is 813450973. The reversal of 813450917 is 719054318.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 618317956 + 195132961 = 24866^2 + 13969^2 .

It is a cyclic number.

It is not a de Polignac number, because 813450917 - 2¹⁰ = 813449893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (813450997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406725458 + 406725459.

It is an arithmetic number, because the mean of its divisors is an integer number (406725459).

Almost surely, 2^813450917 is an apocalyptic number.

It is an amenable number.

813450917 is a deficient number, since it is larger than the sum of its proper divisors (1).

813450917 is an equidigital number, since it uses as much as digits as its factorization.

813450917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 813450917 is about 28521.0609374897. The cubic root of 813450917 is about 933.4916789024.

The spelling of 813450917 in words is "eight hundred thirteen million, four hundred fifty thousand, nine hundred seventeen".