80031209 has 4 divisors (see below), whose sum is σ = 80661504. Its totient is φ = 79400916.

The previous prime is 80031169. The next prime is 80031227. The reversal of 80031209 is 90213008.

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 80031209 - 2²⁰ = 78982633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80031269) 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, 314957 + ... + 315210.

It is an arithmetic number, because the mean of its divisors is an integer number (20165376).

Almost surely, 2^80031209 is an apocalyptic number.

It is an amenable number.

80031209 is a deficient number, since it is larger than the sum of its proper divisors (630295).

80031209 is a wasteful number, since it uses less digits than its factorization.

80031209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630294.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 80031209 is about 8946.0163760190. The cubic root of 80031209 is about 430.9429621820.

The spelling of 80031209 in words is "eighty million, thirty-one thousand, two hundred nine".