725759989 has 4 divisors (see below), whose sum is σ = 726090156. Its totient is φ = 725429824.

The previous prime is 725759987. The next prime is 725760001. The reversal of 725759989 is 989957527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 989957527 = 13 ⋅76150579.

It can be written as a sum of positive squares in 2 ways, for example, as 704902500 + 20857489 = 26550^2 + 4567^2 .

It is a cyclic number.

It is not a de Polignac number, because 725759989 - 2¹ = 725759987 is a prime.

It is a super-3 number, since 3×725759989³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725759987) 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, 161764 + ... + 166189.

It is an arithmetic number, because the mean of its divisors is an integer number (181522539).

Almost surely, 2^725759989 is an apocalyptic number.

It is an amenable number.

725759989 is a deficient number, since it is larger than the sum of its proper divisors (330167).

725759989 is a wasteful number, since it uses less digits than its factorization.

725759989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330166.

The product of its digits is 14288400, while the sum is 61.

The square root of 725759989 is about 26939.9329806145. The cubic root of 725759989 is about 898.6646819260.

The spelling of 725759989 in words is "seven hundred twenty-five million, seven hundred fifty-nine thousand, nine hundred eighty-nine".