80437809 has 8 divisors (see below), whose sum is σ = 107527680. Its totient is φ = 53486576.

The previous prime is 80437801. The next prime is 80437813. The reversal of 80437809 is 90873408.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80437809 - 2³ = 80437801 is a prime.

It is a super-2 number, since 2×80437809² = 12940482233440962, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80437801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33297 + ... + 35630.

It is an arithmetic number, because the mean of its divisors is an integer number (13440960).

Almost surely, 2^80437809 is an apocalyptic number.

It is an amenable number.

80437809 is a deficient number, since it is larger than the sum of its proper divisors (27089871).

80437809 is a wasteful number, since it uses less digits than its factorization.

80437809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69319.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 80437809 is about 8968.7127838949. The cubic root of 80437809 is about 431.6715342262.

The spelling of 80437809 in words is "eighty million, four hundred thirty-seven thousand, eight hundred nine".