80204391 has 8 divisors (see below), whose sum is σ = 118821360. Its totient is φ = 53469576.

The previous prime is 80204387. The next prime is 80204407. The reversal of 80204391 is 19340208.

It is not a de Polignac number, because 80204391 - 2² = 80204387 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 2970533 = 80204391 / (8 + 0 + 2 + 0 + 4 + 3 + 9 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80204291) 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, 1485240 + ... + 1485293.

It is an arithmetic number, because the mean of its divisors is an integer number (14852670).

Almost surely, 2^80204391 is an apocalyptic number.

80204391 is a deficient number, since it is larger than the sum of its proper divisors (38616969).

80204391 is a wasteful number, since it uses less digits than its factorization.

80204391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2970542 (or 2970536 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 80204391 is about 8955.6904256456. The cubic root of 80204391 is about 431.2535818228.

Adding to 80204391 its reverse (19340208), we get a palindrome (99544599).

The spelling of 80204391 in words is "eighty million, two hundred four thousand, three hundred ninety-one".