800355553 has 2 divisors, whose sum is σ = 800355554. Its totient is φ = 800355552.

The previous prime is 800355497. The next prime is 800355593. The reversal of 800355553 is 355553008.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 774620224 + 25735329 = 27832^2 + 5073^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-800355553 is a prime.

It is a super-2 number, since 2×800355553² = 1281138022435871618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (800355593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400177776 + 400177777.

It is an arithmetic number, because the mean of its divisors is an integer number (400177777).

Almost surely, 2^800355553 is an apocalyptic number.

It is an amenable number.

800355553 is a deficient number, since it is larger than the sum of its proper divisors (1).

800355553 is an equidigital number, since it uses as much as digits as its factorization.

800355553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45000, while the sum is 34.

The square root of 800355553 is about 28290.5558976843. Note that the first 3 decimals coincide. The cubic root of 800355553 is about 928.4552739228.

The spelling of 800355553 in words is "eight hundred million, three hundred fifty-five thousand, five hundred fifty-three".