64444031 has 2 divisors, whose sum is σ = 64444032. Its totient is φ = 64444030.

The previous prime is 64444007. The next prime is 64444069. The reversal of 64444031 is 13044446.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64444031 is a prime.

It is a super-2 number, since 2×64444031² = 8306066263057922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64444001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32222015 + 32222016.

It is an arithmetic number, because the mean of its divisors is an integer number (32222016).

Almost surely, 2^64444031 is an apocalyptic number.

64444031 is a deficient number, since it is larger than the sum of its proper divisors (1).

64444031 is an equidigital number, since it uses as much as digits as its factorization.

64444031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 64444031 is about 8027.7039681344. The cubic root of 64444031 is about 400.9229334302.

Adding to 64444031 its reverse (13044446), we get a palindrome (77488477).

The spelling of 64444031 in words is "sixty-four million, four hundred forty-four thousand, thirty-one".