80517842 has 4 divisors (see below), whose sum is σ = 120776766. Its totient is φ = 40258920.

The previous prime is 80517841. The next prime is 80517869. The reversal of 80517842 is 24871508.

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

It can be written as a sum of positive squares in only one way, i.e., 77986561 + 2531281 = 8831^2 + 1591^2 .

It is not an unprimeable number, because it can be changed into a prime (80517841) 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 as a sum of consecutive naturals, namely, 20129459 + ... + 20129462.

Almost surely, 2^80517842 is an apocalyptic number.

80517842 is a deficient number, since it is larger than the sum of its proper divisors (40258924).

80517842 is a wasteful number, since it uses less digits than its factorization.

80517842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40258923.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 80517842 is about 8973.1734631623. The cubic root of 80517842 is about 431.8146531427.

The spelling of 80517842 in words is "eighty million, five hundred seventeen thousand, eight hundred forty-two".