80919506 has 4 divisors (see below), whose sum is σ = 121379262. Its totient is φ = 40459752.

The previous prime is 80919493. The next prime is 80919533. The reversal of 80919506 is 60591908.

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., 52200625 + 28718881 = 7225^2 + 5359^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 80919506.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20229875 + ... + 20229878.

Almost surely, 2^80919506 is an apocalyptic number.

80919506 is a deficient number, since it is larger than the sum of its proper divisors (40459756).

80919506 is a wasteful number, since it uses less digits than its factorization.

80919506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40459755.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 80919506 is about 8995.5269995704. The cubic root of 80919506 is about 432.5314995936.

The spelling of 80919506 in words is "eighty million, nine hundred nineteen thousand, five hundred six".