80204591 has 2 divisors, whose sum is σ = 80204592. Its totient is φ = 80204590.

The previous prime is 80204581. The next prime is 80204599. The reversal of 80204591 is 19540208.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80204591 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80204599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40102295 + 40102296.

It is an arithmetic number, because the mean of its divisors is an integer number (40102296).

Almost surely, 2^80204591 is an apocalyptic number.

80204591 is a deficient number, since it is larger than the sum of its proper divisors (1).

80204591 is an equidigital number, since it uses as much as digits as its factorization.

80204591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 80204591 is about 8955.7015917236. The cubic root of 80204591 is about 431.2539402847.

Adding to 80204591 its reverse (19540208), we get a palindrome (99744799).

The spelling of 80204591 in words is "eighty million, two hundred four thousand, five hundred ninety-one".