80449989 has 4 divisors (see below), whose sum is σ = 107266656. Its totient is φ = 53633324.

The previous prime is 80449969. The next prime is 80449997. The reversal of 80449989 is 98994408.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 80449989 - 2¹³ = 80441797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80449909) 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 in 3 ways as a sum of consecutive naturals, for example, 13408329 + ... + 13408334.

It is an arithmetic number, because the mean of its divisors is an integer number (26816664).

Almost surely, 2^80449989 is an apocalyptic number.

It is an amenable number.

80449989 is a deficient number, since it is larger than the sum of its proper divisors (26816667).

80449989 is a wasteful number, since it uses less digits than its factorization.

80449989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26816666.

The product of its (nonzero) digits is 746496, while the sum is 51.

The square root of 80449989 is about 8969.3917853999. The cubic root of 80449989 is about 431.6933212192.

The spelling of 80449989 in words is "eighty million, four hundred forty-nine thousand, nine hundred eighty-nine".