811667473 has 2 divisors, whose sum is σ = 811667474. Its totient is φ = 811667472.

The previous prime is 811667449. The next prime is 811667477. The reversal of 811667473 is 374766118.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 676364049 + 135303424 = 26007^2 + 11632^2 .

It is a cyclic number.

It is not a de Polignac number, because 811667473 - 2²⁵ = 778113041 is a prime.

It is not a weakly prime, because it can be changed into another prime (811667477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405833736 + 405833737.

It is an arithmetic number, because the mean of its divisors is an integer number (405833737).

Almost surely, 2^811667473 is an apocalyptic number.

It is an amenable number.

811667473 is a deficient number, since it is larger than the sum of its proper divisors (1).

811667473 is an equidigital number, since it uses as much as digits as its factorization.

811667473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 43.

The square root of 811667473 is about 28489.7783950665. The cubic root of 811667473 is about 932.8089709215.

The spelling of 811667473 in words is "eight hundred eleven million, six hundred sixty-seven thousand, four hundred seventy-three".