80437859 has 4 divisors (see below), whose sum is σ = 82399800. Its totient is φ = 78475920.

The previous prime is 80437843. The next prime is 80437871. The reversal of 80437859 is 95873408.

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 80437859 - 2⁴ = 80437843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80437559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 980909 + ... + 980990.

It is an arithmetic number, because the mean of its divisors is an integer number (20599950).

Almost surely, 2^80437859 is an apocalyptic number.

80437859 is a deficient number, since it is larger than the sum of its proper divisors (1961941).

80437859 is a wasteful number, since it uses less digits than its factorization.

80437859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1961940.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 80437859 is about 8968.7155713625. The cubic root of 80437859 is about 431.6716236683.

The spelling of 80437859 in words is "eighty million, four hundred thirty-seven thousand, eight hundred fifty-nine".