80217946 has 4 divisors (see below), whose sum is σ = 120326922. Its totient is φ = 40108972.

The previous prime is 80217931. The next prime is 80217947. The reversal of 80217946 is 64971208.

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., 80192025 + 25921 = 8955^2 + 161^2 .

It is not an unprimeable number, because it can be changed into a prime (80217947) 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, 20054485 + ... + 20054488.

Almost surely, 2^80217946 is an apocalyptic number.

80217946 is a deficient number, since it is larger than the sum of its proper divisors (40108976).

80217946 is a wasteful number, since it uses less digits than its factorization.

80217946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40108975.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 80217946 is about 8956.4471750801. The cubic root of 80217946 is about 431.2778752268.

The spelling of 80217946 in words is "eighty million, two hundred seventeen thousand, nine hundred forty-six".