727541761 has 4 divisors (see below), whose sum is σ = 745286724. Its totient is φ = 709796800.

The previous prime is 727541713. The next prime is 727541791. The reversal of 727541761 is 167145727.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 167145727 = 7 ⋅23877961.

It can be written as a sum of positive squares in 2 ways, for example, as 214066161 + 513475600 = 14631^2 + 22660^2 .

It is a cyclic number.

It is not a de Polignac number, because 727541761 - 2¹⁷ = 727410689 is a prime.

It is a super-2 number, since 2×727541761² = 1058634027997962242, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (727541791) 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 3 ways as a sum of consecutive naturals, for example, 8872420 + ... + 8872501.

It is an arithmetic number, because the mean of its divisors is an integer number (186321681).

Almost surely, 2^727541761 is an apocalyptic number.

It is an amenable number.

727541761 is a deficient number, since it is larger than the sum of its proper divisors (17744963).

727541761 is a wasteful number, since it uses less digits than its factorization.

727541761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17744962.

The product of its digits is 82320, while the sum is 40.

The square root of 727541761 is about 26972.9820561242. The cubic root of 727541761 is about 899.3995010697.

The spelling of 727541761 in words is "seven hundred twenty-seven million, five hundred forty-one thousand, seven hundred sixty-one".