80579138 has 4 divisors (see below), whose sum is σ = 120868710. Its totient is φ = 40289568.

The previous prime is 80579129. The next prime is 80579141. The reversal of 80579138 is 83197508.

It is a happy number.

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., 48622729 + 31956409 = 6973^2 + 5653^2 .

It is a junction number, because it is equal to n+sod(n) for n = 80579095 and 80579104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20144783 + ... + 20144786.

Almost surely, 2^80579138 is an apocalyptic number.

80579138 is a deficient number, since it is larger than the sum of its proper divisors (40289572).

80579138 is a wasteful number, since it uses less digits than its factorization.

80579138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40289571.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 80579138 is about 8976.5883274215. The cubic root of 80579138 is about 431.9242015217.

The spelling of 80579138 in words is "eighty million, five hundred seventy-nine thousand, one hundred thirty-eight".