725646433 has 4 divisors (see below), whose sum is σ = 732691648. Its totient is φ = 718601220.

The previous prime is 725646431. The next prime is 725646469. The reversal of 725646433 is 334646527.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 725646433 - 2¹ = 725646431 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (725646431) 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, 3522453 + ... + 3522658.

It is an arithmetic number, because the mean of its divisors is an integer number (183172912).

Almost surely, 2^725646433 is an apocalyptic number.

It is an amenable number.

725646433 is a deficient number, since it is larger than the sum of its proper divisors (7045215).

725646433 is a wasteful number, since it uses less digits than its factorization.

725646433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7045214.

The product of its digits is 362880, while the sum is 40.

The square root of 725646433 is about 26937.8253205414. The cubic root of 725646433 is about 898.6178096400.

The spelling of 725646433 in words is "seven hundred twenty-five million, six hundred forty-six thousand, four hundred thirty-three".