80678539 has 4 divisors (see below), whose sum is σ = 82001200. Its totient is φ = 79355880.

The previous prime is 80678531. The next prime is 80678629. The reversal of 80678539 is 93587608.

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 80678539 - 2³ = 80678531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80678531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 661239 + ... + 661360.

It is an arithmetic number, because the mean of its divisors is an integer number (20500300).

Almost surely, 2^80678539 is an apocalyptic number.

80678539 is a deficient number, since it is larger than the sum of its proper divisors (1322661).

80678539 is a wasteful number, since it uses less digits than its factorization.

80678539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322660.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 80678539 is about 8982.1233013136. The cubic root of 80678539 is about 432.1017332280.

The spelling of 80678539 in words is "eighty million, six hundred seventy-eight thousand, five hundred thirty-nine".