80831605 has 16 divisors (see below), whose sum is σ = 102337920. Its totient is φ = 61121088.

The previous prime is 80831603. The next prime is 80831627. The reversal of 80831605 is 50613808.

It is a cyclic number.

It is not a de Polignac number, because 80831605 - 2¹ = 80831603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80831603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61384 + ... + 62686.

It is an arithmetic number, because the mean of its divisors is an integer number (6396120).

Almost surely, 2^80831605 is an apocalyptic number.

It is an amenable number.

80831605 is a deficient number, since it is larger than the sum of its proper divisors (21506315).

80831605 is a wasteful number, since it uses less digits than its factorization.

80831605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1980.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 80831605 is about 8990.6398548713. The cubic root of 80831605 is about 432.3748265067.

The spelling of 80831605 in words is "eighty million, eight hundred thirty-one thousand, six hundred five".