39164981 has 8 divisors (see below), whose sum is σ = 40309944. Its totient is φ = 38024640.

The previous prime is 39164971. The next prime is 39164987. The reversal of 39164981 is 18946193.

39164981 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 4 ways, for example, as 13256881 + 25908100 = 3641^2 + 5090^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 39164981 - 2¹⁴ = 39148597 is a prime.

It is a super-2 number, since 2×39164981² = 3067791473460722, 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 (39164987) 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 7 ways as a sum of consecutive naturals, for example, 23351 + ... + 24971.

It is an arithmetic number, because the mean of its divisors is an integer number (5038743).

Almost surely, 2^39164981 is an apocalyptic number.

It is an amenable number.

39164981 is a deficient number, since it is larger than the sum of its proper divisors (1144963).

39164981 is a wasteful number, since it uses less digits than its factorization.

39164981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2311.

The product of its digits is 46656, while the sum is 41.

The square root of 39164981 is about 6258.1931098361. The cubic root of 39164981 is about 339.5986642817.

The spelling of 39164981 in words is "thirty-nine million, one hundred sixty-four thousand, nine hundred eighty-one".