64461247 has 2 divisors, whose sum is σ = 64461248. Its totient is φ = 64461246.

The previous prime is 64461239. The next prime is 64461251. The reversal of 64461247 is 74216446.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64461247 - 2³ = 64461239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64461227) 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, 32230623 + 32230624.

It is an arithmetic number, because the mean of its divisors is an integer number (32230624).

Almost surely, 2^64461247 is an apocalyptic number.

64461247 is a deficient number, since it is larger than the sum of its proper divisors (1).

64461247 is an equidigital number, since it uses as much as digits as its factorization.

64461247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 34.

The square root of 64461247 is about 8028.7761832050. The cubic root of 64461247 is about 400.9586319765.

The spelling of 64461247 in words is "sixty-four million, four hundred sixty-one thousand, two hundred forty-seven".