80605491 has 4 divisors (see below), whose sum is σ = 107473992. Its totient is φ = 53736992.

The previous prime is 80605463. The next prime is 80605507. The reversal of 80605491 is 19450608.

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

It is a cyclic number.

It is not a de Polignac number, because 80605491 - 2¹⁴ = 80589107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80601491) 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, 13434246 + ... + 13434251.

It is an arithmetic number, because the mean of its divisors is an integer number (26868498).

Almost surely, 2^80605491 is an apocalyptic number.

80605491 is a deficient number, since it is larger than the sum of its proper divisors (26868501).

80605491 is a wasteful number, since it uses less digits than its factorization.

80605491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26868500.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 80605491 is about 8978.0560813575. The cubic root of 80605491 is about 431.9712825989.

The spelling of 80605491 in words is "eighty million, six hundred five thousand, four hundred ninety-one".