725683381 has 4 divisors (see below), whose sum is σ = 725746732. Its totient is φ = 725620032.

The previous prime is 725683379. The next prime is 725683391. The reversal of 725683381 is 183386527.

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: 183386527 = 47 ⋅3901841.

It can be written as a sum of positive squares in 2 ways, for example, as 582498225 + 143185156 = 24135^2 + 11966^2 .

It is a cyclic number.

It is not a de Polignac number, because 725683381 - 2¹ = 725683379 is a prime.

It is a super-2 number, since 2×725683381² = 1053232738919182322, which contains 22 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 (725683391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9156 + ... + 39181.

It is an arithmetic number, because the mean of its divisors is an integer number (181436683).

Almost surely, 2^725683381 is an apocalyptic number.

It is an amenable number.

725683381 is a deficient number, since it is larger than the sum of its proper divisors (63351).

725683381 is a wasteful number, since it uses less digits than its factorization.

725683381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63350.

The product of its digits is 241920, while the sum is 43.

The square root of 725683381 is about 26938.5111132742. The cubic root of 725683381 is about 898.6330611297.

The spelling of 725683381 in words is "seven hundred twenty-five million, six hundred eighty-three thousand, three hundred eighty-one".