80684959 has 4 divisors (see below), whose sum is σ = 80707816. Its totient is φ = 80662104.

The previous prime is 80684957. The next prime is 80684987. The reversal of 80684959 is 95948608.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 80684959 - 2¹ = 80684957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80684957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4884 + ... + 13609.

It is an arithmetic number, because the mean of its divisors is an integer number (20176954).

Almost surely, 2^80684959 is an apocalyptic number.

80684959 is a deficient number, since it is larger than the sum of its proper divisors (22857).

80684959 is a wasteful number, since it uses less digits than its factorization.

80684959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22856.

The product of its (nonzero) digits is 622080, while the sum is 49.

The square root of 80684959 is about 8982.4806707279. The cubic root of 80684959 is about 432.1131944318.

The spelling of 80684959 in words is "eighty million, six hundred eighty-four thousand, nine hundred fifty-nine".