80478589 has 4 divisors (see below), whose sum is σ = 82653724. Its totient is φ = 78303456.

The previous prime is 80478551. The next prime is 80478611. The reversal of 80478589 is 98587408.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71267364 + 9211225 = 8442^2 + 3035^2 .

It is a cyclic number.

It is not a de Polignac number, because 80478589 - 2¹⁷ = 80347517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80478689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1087512 + ... + 1087585.

It is an arithmetic number, because the mean of its divisors is an integer number (20663431).

Almost surely, 2^80478589 is an apocalyptic number.

It is an amenable number.

80478589 is a deficient number, since it is larger than the sum of its proper divisors (2175135).

80478589 is a wasteful number, since it uses less digits than its factorization.

80478589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2175134.

The product of its (nonzero) digits is 645120, while the sum is 49.

The square root of 80478589 is about 8970.9859547321. The cubic root of 80478589 is about 431.7444708687.

The spelling of 80478589 in words is "eighty million, four hundred seventy-eight thousand, five hundred eighty-nine".