80431605 has 12 divisors (see below), whose sum is σ = 139414860. Its totient is φ = 42896832.

The previous prime is 80431537. The next prime is 80431633. The reversal of 80431605 is 50613408.

It can be written as a sum of positive squares in 2 ways, for example, as 34503876 + 45927729 = 5874^2 + 6777^2 .

It is not a de Polignac number, because 80431605 - 2⁹ = 80431093 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 893640 + ... + 893729.

It is an arithmetic number, because the mean of its divisors is an integer number (11617905).

Almost surely, 2^80431605 is an apocalyptic number.

It is an amenable number.

80431605 is a deficient number, since it is larger than the sum of its proper divisors (58983255).

80431605 is a wasteful number, since it uses less digits than its factorization.

80431605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1787380 (or 1787377 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 80431605 is about 8968.3669081946. The cubic root of 80431605 is about 431.6604359666.

The spelling of 80431605 in words is "eighty million, four hundred thirty-one thousand, six hundred five".