65054981 has 2 divisors, whose sum is σ = 65054982. Its totient is φ = 65054980.

The previous prime is 65054953. The next prime is 65054989. The reversal of 65054981 is 18945056.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47128225 + 17926756 = 6865^2 + 4234^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65054981 is a prime.

It is a super-2 number, since 2×65054981² = 8464301105820722, which contains 22 as substring.

It is a Sophie Germain prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65054989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32527490 + 32527491.

It is an arithmetic number, because the mean of its divisors is an integer number (32527491).

Almost surely, 2^65054981 is an apocalyptic number.

It is an amenable number.

65054981 is a deficient number, since it is larger than the sum of its proper divisors (1).

65054981 is an equidigital number, since it uses as much as digits as its factorization.

65054981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 65054981 is about 8065.6668044248. Note that the first 3 decimals coincide. The cubic root of 65054981 is about 402.1859098192.

The spelling of 65054981 in words is "sixty-five million, fifty-four thousand, nine hundred eighty-one".