64443061 has 2 divisors, whose sum is σ = 64443062. Its totient is φ = 64443060.

The previous prime is 64443053. The next prime is 64443097. The reversal of 64443061 is 16034446.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64400625 + 42436 = 8025^2 + 206^2 .

It is a cyclic number.

It is not a de Polignac number, because 64443061 - 2³ = 64443053 is a prime.

It is a super-3 number, since 3×64443061³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64443361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32221530 + 32221531.

It is an arithmetic number, because the mean of its divisors is an integer number (32221531).

Almost surely, 2^64443061 is an apocalyptic number.

It is an amenable number.

64443061 is a deficient number, since it is larger than the sum of its proper divisors (1).

64443061 is an equidigital number, since it uses as much as digits as its factorization.

64443061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 64443061 is about 8027.6435521266. The cubic root of 64443061 is about 400.9209218801.

The spelling of 64443061 in words is "sixty-four million, four hundred forty-three thousand, sixty-one".