80939585 has 8 divisors (see below), whose sum is σ = 98019240. Its totient is φ = 64157184.

The previous prime is 80939549. The next prime is 80939591. The reversal of 80939585 is 58593908.

It can be written as a sum of positive squares in 4 ways, for example, as 83521 + 80856064 = 289^2 + 8992^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80939585 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73712 + ... + 74801.

It is an arithmetic number, because the mean of its divisors is an integer number (12252405).

It is the magic constant of a 545 × 545 magic square.

Almost surely, 2^80939585 is an apocalyptic number.

It is an amenable number.

80939585 is a deficient number, since it is larger than the sum of its proper divisors (17079655).

80939585 is a wasteful number, since it uses less digits than its factorization.

80939585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148627.

The product of its (nonzero) digits is 388800, while the sum is 47.

The square root of 80939585 is about 8996.6429850250. The cubic root of 80939585 is about 432.5672721045.

The spelling of 80939585 in words is "eighty million, nine hundred thirty-nine thousand, five hundred eighty-five".