727366991 has 4 divisors (see below), whose sum is σ = 783318312. Its totient is φ = 671415672.

The previous prime is 727366967. The next prime is 727366993. The reversal of 727366991 is 199663727.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-727366991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (727366993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27975641 + ... + 27975666.

It is an arithmetic number, because the mean of its divisors is an integer number (195829578).

Almost surely, 2^727366991 is an apocalyptic number.

727366991 is a deficient number, since it is larger than the sum of its proper divisors (55951321).

727366991 is a wasteful number, since it uses less digits than its factorization.

727366991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55951320.

The product of its digits is 857304, while the sum is 50.

The square root of 727366991 is about 26969.7421381814. The cubic root of 727366991 is about 899.3274774199.

The spelling of 727366991 in words is "seven hundred twenty-seven million, three hundred sixty-six thousand, nine hundred ninety-one".