844890469 has 2 divisors, whose sum is σ = 844890470. Its totient is φ = 844890468.

The previous prime is 844890427. The next prime is 844890479. The reversal of 844890469 is 964098448.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 842450625 + 2439844 = 29025^2 + 1562^2 .

It is a cyclic number.

It is not a de Polignac number, because 844890469 - 2¹⁷ = 844759397 is a prime.

It is a super-2 number, since 2×844890469² = 1427679809214079922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (844890479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422445234 + 422445235.

It is an arithmetic number, because the mean of its divisors is an integer number (422445235).

Almost surely, 2^844890469 is an apocalyptic number.

It is an amenable number.

844890469 is a deficient number, since it is larger than the sum of its proper divisors (1).

844890469 is an equidigital number, since it uses as much as digits as its factorization.

844890469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1990656, while the sum is 52.

The square root of 844890469 is about 29066.9996559672. Note that the first 3 decimals coincide. The cubic root of 844890469 is about 945.3663441565.

The spelling of 844890469 in words is "eight hundred forty-four million, eight hundred ninety thousand, four hundred sixty-nine".