64634767 has 2 divisors, whose sum is σ = 64634768. Its totient is φ = 64634766.

The previous prime is 64634743. The next prime is 64634797. The reversal of 64634767 is 76743646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64634767 - 2¹¹ = 64632719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64634797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32317383 + 32317384.

It is an arithmetic number, because the mean of its divisors is an integer number (32317384).

Almost surely, 2^64634767 is an apocalyptic number.

64634767 is a deficient number, since it is larger than the sum of its proper divisors (1).

64634767 is an equidigital number, since it uses as much as digits as its factorization.

64634767 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 43.

The square root of 64634767 is about 8039.5750509589. The cubic root of 64634767 is about 401.3180831215.

The spelling of 64634767 in words is "sixty-four million, six hundred thirty-four thousand, seven hundred sixty-seven".