64719223 has 2 divisors, whose sum is σ = 64719224. Its totient is φ = 64719222.

The previous prime is 64719209. The next prime is 64719229. The reversal of 64719223 is 32291746.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64719223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64719229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32359611 + 32359612.

It is an arithmetic number, because the mean of its divisors is an integer number (32359612).

Almost surely, 2^64719223 is an apocalyptic number.

64719223 is a deficient number, since it is larger than the sum of its proper divisors (1).

64719223 is an equidigital number, since it uses as much as digits as its factorization.

64719223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 34.

The square root of 64719223 is about 8044.8258526832. The cubic root of 64719223 is about 401.4928031662.

The spelling of 64719223 in words is "sixty-four million, seven hundred nineteen thousand, two hundred twenty-three".