725815733 has 4 divisors (see below), whose sum is σ = 725978220. Its totient is φ = 725653248.

The previous prime is 725815709. The next prime is 725815763. The reversal of 725815733 is 337518527.

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 342361009 + 383454724 = 18503^2 + 19582^2 .

It is a cyclic number.

It is not a de Polignac number, because 725815733 - 2¹⁰ = 725814709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725815763) 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, 74348 + ... + 83541.

It is an arithmetic number, because the mean of its divisors is an integer number (181494555).

Almost surely, 2^725815733 is an apocalyptic number.

It is an amenable number.

725815733 is a deficient number, since it is larger than the sum of its proper divisors (162487).

725815733 is a wasteful number, since it uses less digits than its factorization.

725815733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162486.

The product of its digits is 176400, while the sum is 41.

The square root of 725815733 is about 26940.9675587199. The cubic root of 725815733 is about 898.6876894778.

The spelling of 725815733 in words is "seven hundred twenty-five million, eight hundred fifteen thousand, seven hundred thirty-three".