725677817 has 4 divisors (see below), whose sum is σ = 750701220. Its totient is φ = 700654416.

The previous prime is 725677789. The next prime is 725677859. The reversal of 725677817 is 718776527.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 540609001 + 185068816 = 23251^2 + 13604^2 .

It is a cyclic number.

It is not a de Polignac number, because 725677817 - 2¹⁰ = 725676793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (725677867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12511658 + ... + 12511715.

It is an arithmetic number, because the mean of its divisors is an integer number (187675305).

Almost surely, 2^725677817 is an apocalyptic number.

It is an amenable number.

725677817 is a deficient number, since it is larger than the sum of its proper divisors (25023403).

725677817 is a wasteful number, since it uses less digits than its factorization.

725677817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25023402.

The product of its digits is 1152480, while the sum is 50.

The square root of 725677817 is about 26938.4078408506. The cubic root of 725677817 is about 898.6307644407.

The spelling of 725677817 in words is "seven hundred twenty-five million, six hundred seventy-seven thousand, eight hundred seventeen".