727045861 has 4 divisors (see below), whose sum is σ = 730813132. Its totient is φ = 723278592.

The previous prime is 727045829. The next prime is 727045889. The reversal of 727045861 is 168540727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 168540727 = 251 ⋅671477.

It can be written as a sum of positive squares in 2 ways, for example, as 231983361 + 495062500 = 15231^2 + 22250^2 .

It is a cyclic number.

It is not a de Polignac number, because 727045861 - 2⁵ = 727045829 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 (727045261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1883346 + ... + 1883731.

It is an arithmetic number, because the mean of its divisors is an integer number (182703283).

Almost surely, 2^727045861 is an apocalyptic number.

It is an amenable number.

727045861 is a deficient number, since it is larger than the sum of its proper divisors (3767271).

727045861 is a wasteful number, since it uses less digits than its factorization.

727045861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3767270.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 727045861 is about 26963.7879571844. The cubic root of 727045861 is about 899.1951079519.

The spelling of 727045861 in words is "seven hundred twenty-seven million, forty-five thousand, eight hundred sixty-one".