800444549 has 2 divisors, whose sum is σ = 800444550. Its totient is φ = 800444548.

The previous prime is 800444479. The next prime is 800444587. The reversal of 800444549 is 945444008.

It is an a-pointer prime, because the next prime (800444587) can be obtained adding 800444549 to its sum of digits (38).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 767013025 + 33431524 = 27695^2 + 5782^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-800444549 is a prime.

It is a super-2 number, since 2×800444549² = 1281422952047626802, which contains 22 as substring.

It is equal to p_41167973 and since 800444549 and 41167973 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (800434549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400222274 + 400222275.

It is an arithmetic number, because the mean of its divisors is an integer number (400222275).

Almost surely, 2^800444549 is an apocalyptic number.

It is an amenable number.

800444549 is a deficient number, since it is larger than the sum of its proper divisors (1).

800444549 is an equidigital number, since it uses as much as digits as its factorization.

800444549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 92160, while the sum is 38.

The square root of 800444549 is about 28292.1287463492. The cubic root of 800444549 is about 928.4896860216.

The spelling of 800444549 in words is "eight hundred million, four hundred forty-four thousand, five hundred forty-nine".