727989505 has 16 divisors (see below), whose sum is σ = 894518784. Its totient is φ = 568592640.

The previous prime is 727989499. The next prime is 727989529. The reversal of 727989505 is 505989727.

It is not a de Polignac number, because 727989505 - 2¹³ = 727981313 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 28240 + ... + 47470.

It is an arithmetic number, because the mean of its divisors is an integer number (55907424).

Almost surely, 2^727989505 is an apocalyptic number.

It is an amenable number.

727989505 is a deficient number, since it is larger than the sum of its proper divisors (166529279).

727989505 is a wasteful number, since it uses less digits than its factorization.

727989505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19416.

The product of its (nonzero) digits is 1587600, while the sum is 52.

The square root of 727989505 is about 26981.2806404737. The cubic root of 727989505 is about 899.5839661501.

The spelling of 727989505 in words is "seven hundred twenty-seven million, nine hundred eighty-nine thousand, five hundred five".