64423169 has 2 divisors, whose sum is σ = 64423170. Its totient is φ = 64423168.

The previous prime is 64423127. The next prime is 64423171. The reversal of 64423169 is 96132446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46036225 + 18386944 = 6785^2 + 4288^2 .

It is a cyclic number.

It is not a de Polignac number, because 64423169 - 2¹² = 64419073 is a prime.

It is a super-2 number, since 2×64423169² = 8300689408005122, which contains 22 as substring.

Together with 64423171, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64423369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32211584 + 32211585.

It is an arithmetic number, because the mean of its divisors is an integer number (32211585).

Almost surely, 2^64423169 is an apocalyptic number.

It is an amenable number.

64423169 is a deficient number, since it is larger than the sum of its proper divisors (1).

64423169 is an equidigital number, since it uses as much as digits as its factorization.

64423169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 35.

The square root of 64423169 is about 8026.4044876894. The cubic root of 64423169 is about 400.8796661339.

The spelling of 64423169 in words is "sixty-four million, four hundred twenty-three thousand, one hundred sixty-nine".