811493 has 2 divisors, whose sum is σ = 811494. Its totient is φ = 811492.

The previous prime is 811469. The next prime is 811501. The reversal of 811493 is 394118.

811493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 543169 + 268324 = 737^2 + 518^2 .

It is a cyclic number.

It is not a de Polignac number, because 811493 - 2⁶ = 811429 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (811193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405746 + 405747.

It is an arithmetic number, because the mean of its divisors is an integer number (405747).

2⁸¹¹⁴⁹³ is an apocalyptic number.

It is an amenable number.

811493 is a deficient number, since it is larger than the sum of its proper divisors (1).

811493 is an equidigital number, since it uses as much as digits as its factorization.

811493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 26.

The square root of 811493 is about 900.8290625862. The cubic root of 811493 is about 93.2742128424.

The spelling of 811493 in words is "eight hundred eleven thousand, four hundred ninety-three".