80449091 has 2 divisors, whose sum is σ = 80449092. Its totient is φ = 80449090.

The previous prime is 80449081. The next prime is 80449129. The reversal of 80449091 is 19094408.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80449091 is a prime.

It is not a weakly prime, because it can be changed into another prime (80449051) 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, 40224545 + 40224546.

It is an arithmetic number, because the mean of its divisors is an integer number (40224546).

Almost surely, 2^80449091 is an apocalyptic number.

80449091 is a deficient number, since it is larger than the sum of its proper divisors (1).

80449091 is an equidigital number, since it uses as much as digits as its factorization.

80449091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 80449091 is about 8969.3417261246. The cubic root of 80449091 is about 431.6917149954.

The spelling of 80449091 in words is "eighty million, four hundred forty-nine thousand, ninety-one".