64921067 has 2 divisors, whose sum is σ = 64921068. Its totient is φ = 64921066.

The previous prime is 64921009. The next prime is 64921093. The reversal of 64921067 is 76012946.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64921067 - 2⁸ = 64920811 is a prime.

It is a Chen prime.

It is equal to p_3836159 and since 64921067 and 3836159 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (64921007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32460533 + 32460534.

It is an arithmetic number, because the mean of its divisors is an integer number (32460534).

Almost surely, 2^64921067 is an apocalyptic number.

64921067 is a deficient number, since it is larger than the sum of its proper divisors (1).

64921067 is an equidigital number, since it uses as much as digits as its factorization.

64921067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 64921067 is about 8057.3610444115. The cubic root of 64921067 is about 401.9097571416.

The spelling of 64921067 in words is "sixty-four million, nine hundred twenty-one thousand, sixty-seven".