64346647 has 2 divisors, whose sum is σ = 64346648. Its totient is φ = 64346646.

The previous prime is 64346627. The next prime is 64346651. The reversal of 64346647 is 74664346.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64346647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64346627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32173323 + 32173324.

It is an arithmetic number, because the mean of its divisors is an integer number (32173324).

Almost surely, 2^64346647 is an apocalyptic number.

64346647 is a deficient number, since it is larger than the sum of its proper divisors (1).

64346647 is an equidigital number, since it uses as much as digits as its factorization.

64346647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 40.

The square root of 64346647 is about 8021.6361797329. The cubic root of 64346647 is about 400.7208812949.

The spelling of 64346647 in words is "sixty-four million, three hundred forty-six thousand, six hundred forty-seven".