64981093 has 2 divisors, whose sum is σ = 64981094. Its totient is φ = 64981092.

The previous prime is 64981087. The next prime is 64981097. The reversal of 64981093 is 39018946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64931364 + 49729 = 8058^2 + 223^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64981093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64981097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32490546 + 32490547.

It is an arithmetic number, because the mean of its divisors is an integer number (32490547).

Almost surely, 2^64981093 is an apocalyptic number.

It is an amenable number.

64981093 is a deficient number, since it is larger than the sum of its proper divisors (1).

64981093 is an equidigital number, since it uses as much as digits as its factorization.

64981093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 64981093 is about 8061.0851006549. The cubic root of 64981093 is about 402.0335875338.

The spelling of 64981093 in words is "sixty-four million, nine hundred eighty-one thousand, ninety-three".