80550091 has 2 divisors, whose sum is σ = 80550092. Its totient is φ = 80550090.

The previous prime is 80550079. The next prime is 80550181. The reversal of 80550091 is 19005508.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80550091 - 2²¹ = 78452939 is a prime.

It is not a weakly prime, because it can be changed into another prime (80550191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40275045 + 40275046.

It is an arithmetic number, because the mean of its divisors is an integer number (40275046).

Almost surely, 2^80550091 is an apocalyptic number.

80550091 is a deficient number, since it is larger than the sum of its proper divisors (1).

80550091 is an equidigital number, since it uses as much as digits as its factorization.

80550091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 80550091 is about 8974.9702506471. The cubic root of 80550091 is about 431.8722955718.

Adding to 80550091 its reverse (19005508), we get a palindrome (99555599).

The spelling of 80550091 in words is "eighty million, five hundred fifty thousand, ninety-one".