27064981 has 4 divisors (see below), whose sum is σ = 27078700. Its totient is φ = 27051264.

The previous prime is 27064967. The next prime is 27064991. The reversal of 27064981 is 18946072.

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 7784100 + 19280881 = 2790^2 + 4391^2 .

It is a cyclic number.

It is not a de Polignac number, because 27064981 - 2¹⁷ = 26933909 is a prime.

It is a super-2 number, since 2×27064981² = 1465026393060722, which contains 22 as substring.

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 27064981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27064991) 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, 3276 + ... + 8053.

It is an arithmetic number, because the mean of its divisors is an integer number (6769675).

Almost surely, 2^27064981 is an apocalyptic number.

It is an amenable number.

27064981 is a deficient number, since it is larger than the sum of its proper divisors (13719).

27064981 is a wasteful number, since it uses less digits than its factorization.

27064981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13718.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 27064981 is about 5202.4014647084. The cubic root of 27064981 is about 300.2404775540.

The spelling of 27064981 in words is "twenty-seven million, sixty-four thousand, nine hundred eighty-one".