80530491 has 4 divisors (see below), whose sum is σ = 107373992. Its totient is φ = 53686992.

The previous prime is 80530487. The next prime is 80530511. The reversal of 80530491 is 19403508.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 80530491 - 2² = 80530487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80530421) 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, 13421746 + ... + 13421751.

It is an arithmetic number, because the mean of its divisors is an integer number (26843498).

Almost surely, 2^80530491 is an apocalyptic number.

80530491 is a deficient number, since it is larger than the sum of its proper divisors (26843501).

80530491 is a wasteful number, since it uses less digits than its factorization.

80530491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26843500.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 80530491 is about 8973.8782585903. The cubic root of 80530491 is about 431.8372640217.

Adding to 80530491 its reverse (19403508), we get a palindrome (99933999).

The spelling of 80530491 in words is "eighty million, five hundred thirty thousand, four hundred ninety-one".