64442269 has 2 divisors, whose sum is σ = 64442270. Its totient is φ = 64442268.

The previous prime is 64442267. The next prime is 64442293. The reversal of 64442269 is 96224446.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58706244 + 5736025 = 7662^2 + 2395^2 .

It is a cyclic number.

It is not a de Polignac number, because 64442269 - 2¹ = 64442267 is a prime.

It is a super-2 number, since 2×64442269² = 8305612067736722, which contains 22 as substring.

Together with 64442267, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64442267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32221134 + 32221135.

It is an arithmetic number, because the mean of its divisors is an integer number (32221135).

Almost surely, 2^64442269 is an apocalyptic number.

It is an amenable number.

64442269 is a deficient number, since it is larger than the sum of its proper divisors (1).

64442269 is an equidigital number, since it uses as much as digits as its factorization.

64442269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 37.

The square root of 64442269 is about 8027.5942224305. The cubic root of 64442269 is about 400.9192794448.

The spelling of 64442269 in words is "sixty-four million, four hundred forty-two thousand, two hundred sixty-nine".