64279121 has 2 divisors, whose sum is σ = 64279122. Its totient is φ = 64279120.

The previous prime is 64279067. The next prime is 64279123. The reversal of 64279121 is 12197246.

It is a happy number.

64279121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44742721 + 19536400 = 6689^2 + 4420^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64279121 is a prime.

Together with 64279123, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64279123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32139560 + 32139561.

It is an arithmetic number, because the mean of its divisors is an integer number (32139561).

Almost surely, 2^64279121 is an apocalyptic number.

It is an amenable number.

64279121 is a deficient number, since it is larger than the sum of its proper divisors (1).

64279121 is an equidigital number, since it uses as much as digits as its factorization.

64279121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 32.

The square root of 64279121 is about 8017.4260832265. The cubic root of 64279121 is about 400.5806587640.

The spelling of 64279121 in words is "sixty-four million, two hundred seventy-nine thousand, one hundred twenty-one".