64217623 has 2 divisors, whose sum is σ = 64217624. Its totient is φ = 64217622.

The previous prime is 64217617. The next prime is 64217669. The reversal of 64217623 is 32671246.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64217623 - 2⁵ = 64217591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64217693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32108811 + 32108812.

It is an arithmetic number, because the mean of its divisors is an integer number (32108812).

Almost surely, 2^64217623 is an apocalyptic number.

64217623 is a deficient number, since it is larger than the sum of its proper divisors (1).

64217623 is an equidigital number, since it uses as much as digits as its factorization.

64217623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 31.

The square root of 64217623 is about 8013.5898946727. The cubic root of 64217623 is about 400.4528683322.

Adding to 64217623 its reverse (32671246), we get a palindrome (96888869).

The spelling of 64217623 in words is "sixty-four million, two hundred seventeen thousand, six hundred twenty-three".