725784163 has 4 divisors (see below), whose sum is σ = 781613728. Its totient is φ = 669954600.

The previous prime is 725784151. The next prime is 725784181. The reversal of 725784163 is 361487527.

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

It is a cyclic number.

It is not a de Polignac number, because 725784163 - 2⁹ = 725783651 is a prime.

It is a super-2 number, since 2×725784163² = 1053525302523221138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (725781163) 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, 27914763 + ... + 27914788.

It is an arithmetic number, because the mean of its divisors is an integer number (195403432).

Almost surely, 2^725784163 is an apocalyptic number.

725784163 is a deficient number, since it is larger than the sum of its proper divisors (55829565).

725784163 is a wasteful number, since it uses less digits than its factorization.

725784163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55829564.

The product of its digits is 282240, while the sum is 43.

The square root of 725784163 is about 26940.3816416917. The cubic root of 725784163 is about 898.6746595491.

The spelling of 725784163 in words is "seven hundred twenty-five million, seven hundred eighty-four thousand, one hundred sixty-three".