819373 has 2 divisors, whose sum is σ = 819374. Its totient is φ = 819372.

The previous prime is 819367. The next prime is 819389. The reversal of 819373 is 373918.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 660969 + 158404 = 813^2 + 398^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-819373 is a prime.

It is a super-2 number, since 2×819373² = 1342744226258, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (819073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409686 + 409687.

It is an arithmetic number, because the mean of its divisors is an integer number (409687).

2⁸¹⁹³⁷³ is an apocalyptic number.

It is an amenable number.

819373 is a deficient number, since it is larger than the sum of its proper divisors (1).

819373 is an equidigital number, since it uses as much as digits as its factorization.

819373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 31.

The square root of 819373 is about 905.1922447746. The cubic root of 819373 is about 93.5751538137.

The spelling of 819373 in words is "eight hundred nineteen thousand, three hundred seventy-three".