727288981 has 8 divisors (see below), whose sum is σ = 735834528. Its totient is φ = 718770000.

The previous prime is 727288967. The next prime is 727288987. The reversal of 727288981 is 189882727.

727288981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 727288981 - 2⁹ = 727288469 is a prime.

It is a super-2 number, since 2×727288981² = 1057898523768036722, 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 (727288987) 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, 51366 + ... + 63976.

It is an arithmetic number, because the mean of its divisors is an integer number (91979316).

Almost surely, 2^727288981 is an apocalyptic number.

It is an amenable number.

727288981 is a deficient number, since it is larger than the sum of its proper divisors (8545547).

727288981 is a wasteful number, since it uses less digits than its factorization.

727288981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13283.

The product of its digits is 903168, while the sum is 52.

The square root of 727288981 is about 26968.2958490150. The cubic root of 727288981 is about 899.2953253583.

The spelling of 727288981 in words is "seven hundred twenty-seven million, two hundred eighty-eight thousand, nine hundred eighty-one".