39489389 has 4 divisors (see below), whose sum is σ = 39933180. Its totient is φ = 39045600.

The previous prime is 39489377. The next prime is 39489403. The reversal of 39489389 is 98398493.

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 19731364 + 19758025 = 4442^2 + 4445^2 .

It is a cyclic number.

It is not a de Polignac number, because 39489389 - 2¹² = 39485293 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 39489389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39482389) 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, 221762 + ... + 221939.

It is an arithmetic number, because the mean of its divisors is an integer number (9983295).

Almost surely, 2^39489389 is an apocalyptic number.

It is an amenable number.

39489389 is a deficient number, since it is larger than the sum of its proper divisors (443791).

39489389 is an equidigital number, since it uses as much as digits as its factorization.

39489389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443790.

The product of its digits is 1679616, while the sum is 53.

The square root of 39489389 is about 6284.0583224537. The cubic root of 39489389 is about 340.5337320664.

The spelling of 39489389 in words is "thirty-nine million, four hundred eighty-nine thousand, three hundred eighty-nine".