80593981 has 8 divisors (see below), whose sum is σ = 87110744. Its totient is φ = 74122560.

The previous prime is 80593979. The next prime is 80594009. The reversal of 80593981 is 18939508.

It can be written as a sum of positive squares in 4 ways, for example, as 401956 + 80192025 = 634^2 + 8955^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80593981 - 2¹ = 80593979 is a prime.

It is a super-2 number, since 2×80593981² = 12990779546856722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80593901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7590 + ... + 14791.

It is an arithmetic number, because the mean of its divisors is an integer number (10888843).

Almost surely, 2^80593981 is an apocalyptic number.

It is an amenable number.

80593981 is a deficient number, since it is larger than the sum of its proper divisors (6516763).

80593981 is a wasteful number, since it uses less digits than its factorization.

80593981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22671.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 80593981 is about 8977.4150511158. The cubic root of 80593981 is about 431.9507206162.

The spelling of 80593981 in words is "eighty million, five hundred ninety-three thousand, nine hundred eighty-one".