80408709 has 6 divisors (see below), whose sum is σ = 116145926. Its totient is φ = 53605800.

The previous prime is 80408689. The next prime is 80408723. The reversal of 80408709 is 90780408.

It can be written as a sum of positive squares in only one way, i.e., 73102500 + 7306209 = 8550^2 + 2703^2 .

It is not a de Polignac number, because 80408709 - 2²³ = 72020101 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 (80408789) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4467142 + ... + 4467159.

Almost surely, 2^80408709 is an apocalyptic number.

It is an amenable number.

80408709 is a deficient number, since it is larger than the sum of its proper divisors (35737217).

80408709 is a wasteful number, since it uses less digits than its factorization.

80408709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8934307 (or 8934304 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 80408709 is about 8967.0903307595. The cubic root of 80408709 is about 431.6194726525.

The spelling of 80408709 in words is "eighty million, four hundred eight thousand, seven hundred nine".