80872906 has 4 divisors (see below), whose sum is σ = 121309362. Its totient is φ = 40436452.

The previous prime is 80872903. The next prime is 80872921. The reversal of 80872906 is 60927808.

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., 72948681 + 7924225 = 8541^2 + 2815^2 .

It is not an unprimeable number, because it can be changed into a prime (80872901) by changing a digit.

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, 20218225 + ... + 20218228.

Almost surely, 2^80872906 is an apocalyptic number.

80872906 is a deficient number, since it is larger than the sum of its proper divisors (40436456).

80872906 is a wasteful number, since it uses less digits than its factorization.

80872906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40436455.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 80872906 is about 8992.9364503481. The cubic root of 80872906 is about 432.4484547701.

The spelling of 80872906 in words is "eighty million, eight hundred seventy-two thousand, nine hundred six".