819473069 has 2 divisors, whose sum is σ = 819473070. Its totient is φ = 819473068.

The previous prime is 819473051. The next prime is 819473093. The reversal of 819473069 is 960374918.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 583850569 + 235622500 = 24163^2 + 15350^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-819473069 is a prime.

It is a super-2 number, since 2×819473069² = 1343072221632557522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (819473029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409736534 + 409736535.

It is an arithmetic number, because the mean of its divisors is an integer number (409736535).

Almost surely, 2^819473069 is an apocalyptic number.

It is an amenable number.

819473069 is a deficient number, since it is larger than the sum of its proper divisors (1).

819473069 is an equidigital number, since it uses as much as digits as its factorization.

819473069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 819473069 is about 28626.4400336472. The cubic root of 819473069 is about 935.7896306419.

The spelling of 819473069 in words is "eight hundred nineteen million, four hundred seventy-three thousand, sixty-nine".