65444287 has 2 divisors, whose sum is σ = 65444288. Its totient is φ = 65444286.

The previous prime is 65444261. The next prime is 65444293. The reversal of 65444287 is 78244456.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65444287 - 2¹¹ = 65442239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65444087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32722143 + 32722144.

It is an arithmetic number, because the mean of its divisors is an integer number (32722144).

Almost surely, 2^65444287 is an apocalyptic number.

65444287 is a deficient number, since it is larger than the sum of its proper divisors (1).

65444287 is an equidigital number, since it uses as much as digits as its factorization.

65444287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 215040, while the sum is 40.

The square root of 65444287 is about 8089.7643352572. The cubic root of 65444287 is about 402.9865766515.

The spelling of 65444287 in words is "sixty-five million, four hundred forty-four thousand, two hundred eighty-seven".