725609659 has 4 divisors (see below), whose sum is σ = 730061416. Its totient is φ = 721157904.

The previous prime is 725609617. The next prime is 725609669. The reversal of 725609659 is 956906527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 956906527 = 239 ⋅4003793.

It is a cyclic number.

It is not a de Polignac number, because 725609659 - 2¹³ = 725601467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (725609669) 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, 2225634 + ... + 2225959.

It is an arithmetic number, because the mean of its divisors is an integer number (182515354).

Almost surely, 2^725609659 is an apocalyptic number.

725609659 is a deficient number, since it is larger than the sum of its proper divisors (4451757).

725609659 is a wasteful number, since it uses less digits than its factorization.

725609659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4451756.

The product of its (nonzero) digits is 1020600, while the sum is 49.

The square root of 725609659 is about 26937.1427400903. The cubic root of 725609659 is about 898.6026294603.

The spelling of 725609659 in words is "seven hundred twenty-five million, six hundred nine thousand, six hundred fifty-nine".