80424139 has 4 divisors (see below), whose sum is σ = 81787320. Its totient is φ = 79060960.

The previous prime is 80424119. The next prime is 80424143. The reversal of 80424139 is 93142408.

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 80424139 - 2⁷ = 80424011 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80424139.

It is not an unprimeable number, because it can be changed into a prime (80424109) 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, 681502 + ... + 681619.

It is an arithmetic number, because the mean of its divisors is an integer number (20446830).

Almost surely, 2^80424139 is an apocalyptic number.

80424139 is a deficient number, since it is larger than the sum of its proper divisors (1363181).

80424139 is a wasteful number, since it uses less digits than its factorization.

80424139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363180.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 80424139 is about 8967.9506577590. The cubic root of 80424139 is about 431.6470793741.

The spelling of 80424139 in words is "eighty million, four hundred twenty-four thousand, one hundred thirty-nine".