64994081 has 2 divisors, whose sum is σ = 64994082. Its totient is φ = 64994080.

The previous prime is 64994071. The next prime is 64994099. The reversal of 64994081 is 18049946.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64657681 + 336400 = 8041^2 + 580^2 .

It is a cyclic number.

It is not a de Polignac number, because 64994081 - 2²² = 60799777 is a prime.

It is a super-2 number, since 2×64994081² = 8448461130069122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64994051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32497040 + 32497041.

It is an arithmetic number, because the mean of its divisors is an integer number (32497041).

Almost surely, 2^64994081 is an apocalyptic number.

It is an amenable number.

64994081 is a deficient number, since it is larger than the sum of its proper divisors (1).

64994081 is an equidigital number, since it uses as much as digits as its factorization.

64994081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 64994081 is about 8061.8906591444. The cubic root of 64994081 is about 402.0603710393.

The spelling of 64994081 in words is "sixty-four million, nine hundred ninety-four thousand, eighty-one".