727081993 has 16 divisors (see below), whose sum is σ = 847566720. Its totient is φ = 616377600.

The previous prime is 727081981. The next prime is 727082009. The reversal of 727081993 is 399180727.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 727081993 - 2¹³ = 727073801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (727081903) 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 15 ways as a sum of consecutive naturals, for example, 2548 + ... + 38218.

It is an arithmetic number, because the mean of its divisors is an integer number (52972920).

Almost surely, 2^727081993 is an apocalyptic number.

It is an amenable number.

727081993 is a deficient number, since it is larger than the sum of its proper divisors (120484727).

727081993 is a wasteful number, since it uses less digits than its factorization.

727081993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35808.

The product of its (nonzero) digits is 190512, while the sum is 46.

The square root of 727081993 is about 26964.4579585795. The cubic root of 727081993 is about 899.2100034724.

The spelling of 727081993 in words is "seven hundred twenty-seven million, eighty-one thousand, nine hundred ninety-three".