43725399 has 8 divisors (see below), whose sum is σ = 58389360. Its totient is φ = 29105856.

The previous prime is 43725397. The next prime is 43725419. The reversal of 43725399 is 99352734.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 43725399 - 2¹ = 43725397 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 43725399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43725397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8734 + ... + 12795.

It is an arithmetic number, because the mean of its divisors is an integer number (7298670).

Almost surely, 2^43725399 is an apocalyptic number.

43725399 is a deficient number, since it is larger than the sum of its proper divisors (14663961).

43725399 is a wasteful number, since it uses less digits than its factorization.

43725399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22209.

The product of its digits is 204120, while the sum is 42.

The square root of 43725399 is about 6612.5183553620. The cubic root of 43725399 is about 352.2988782786.

The spelling of 43725399 in words is "forty-three million, seven hundred twenty-five thousand, three hundred ninety-nine".