39266981 has 16 divisors (see below), whose sum is σ = 43382640. Its totient is φ = 35530560.

The previous prime is 39266959. The next prime is 39266993. The reversal of 39266981 is 18966293.

39266981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 27984100 + 11282881 = 5290^2 + 3359^2 .

It is a de Polignac number, because none of the positive numbers 2^k-39266981 is a prime.

It is a super-2 number, since 2×39266981² = 3083791593708722, 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 (39266921) 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 15 ways as a sum of consecutive naturals, for example, 133871 + ... + 134163.

It is an arithmetic number, because the mean of its divisors is an integer number (2711415).

Almost surely, 2^39266981 is an apocalyptic number.

It is an amenable number.

39266981 is a deficient number, since it is larger than the sum of its proper divisors (4115659).

39266981 is an equidigital number, since it uses as much as digits as its factorization.

39266981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393 (or 367 counting only the distinct ones).

The product of its digits is 139968, while the sum is 44.

The square root of 39266981 is about 6266.3371278603. The cubic root of 39266981 is about 339.8932219482.

The spelling of 39266981 in words is "thirty-nine million, two hundred sixty-six thousand, nine hundred eighty-one".