725235739 has 4 divisors (see below), whose sum is σ = 725291856. Its totient is φ = 725179624.

The previous prime is 725235727. The next prime is 725235761. The reversal of 725235739 is 937532527.

725235739 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 937532527 = 41 ⋅22866647.

It is a cyclic number.

It is not a de Polignac number, because 725235739 - 2⁹ = 725235227 is a prime.

It is a super-2 number, since 2×725235739² = 1051933754245752242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 725235695 and 725235704.

It is not an unprimeable number, because it can be changed into a prime (725215739) 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, 2217 + ... + 38149.

It is an arithmetic number, because the mean of its divisors is an integer number (181322964).

Almost surely, 2^725235739 is an apocalyptic number.

725235739 is a deficient number, since it is larger than the sum of its proper divisors (56117).

725235739 is a wasteful number, since it uses less digits than its factorization.

725235739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56116.

The product of its digits is 396900, while the sum is 43.

The square root of 725235739 is about 26930.2012432139. The cubic root of 725235739 is about 898.4482474524.

The spelling of 725235739 in words is "seven hundred twenty-five million, two hundred thirty-five thousand, seven hundred thirty-nine".