725779 has 4 divisors (see below), whose sum is σ = 730800. Its totient is φ = 720760.

The previous prime is 725749. The next prime is 725789. The reversal of 725779 is 977527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 977527 = 419 ⋅2333.

It is a cyclic number.

It is not a de Polignac number, because 725779 - 2¹⁹ = 201491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (725749) 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, 2287 + ... + 2584.

It is an arithmetic number, because the mean of its divisors is an integer number (182700).

2⁷²⁵⁷⁷⁹ is an apocalyptic number.

725779 is a deficient number, since it is larger than the sum of its proper divisors (5021).

725779 is a wasteful number, since it uses less digits than its factorization.

725779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5020.

The product of its digits is 30870, while the sum is 37.

The square root of 725779 is about 851.9266400342. The cubic root of 725779 is about 89.8672528581.

The spelling of 725779 in words is "seven hundred twenty-five thousand, seven hundred seventy-nine".