39004981 has 4 divisors (see below), whose sum is σ = 39956364. Its totient is φ = 38053600.

The previous prime is 39004969. The next prime is 39004997. The reversal of 39004981 is 18940093.

39004981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18940093 = 19 ⋅996847.

It can be written as a sum of positive squares in 2 ways, for example, as 14945956 + 24059025 = 3866^2 + 4905^2 .

It is a cyclic number.

It is not a de Polignac number, because 39004981 - 2¹⁷ = 38873909 is a prime.

It is a super-2 number, since 2×39004981² = 3042777085620722, 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 (39004951) 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, 475630 + ... + 475711.

It is an arithmetic number, because the mean of its divisors is an integer number (9989091).

Almost surely, 2^39004981 is an apocalyptic number.

It is an amenable number.

39004981 is a deficient number, since it is larger than the sum of its proper divisors (951383).

39004981 is an equidigital number, since it uses as much as digits as its factorization.

39004981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951382.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 39004981 is about 6245.3967848328. The cubic root of 39004981 is about 339.1355809725.

The spelling of 39004981 in words is "thirty-nine million, four thousand, nine hundred eighty-one".