64445903 has 2 divisors, whose sum is σ = 64445904. Its totient is φ = 64445902.

The previous prime is 64445833. The next prime is 64445911. The reversal of 64445903 is 30954446.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64445903 - 2¹⁰ = 64444879 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64445503) 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, 32222951 + 32222952.

It is an arithmetic number, because the mean of its divisors is an integer number (32222952).

Almost surely, 2^64445903 is an apocalyptic number.

64445903 is a deficient number, since it is larger than the sum of its proper divisors (1).

64445903 is an equidigital number, since it uses as much as digits as its factorization.

64445903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 64445903 is about 8027.8205635154. The cubic root of 64445903 is about 400.9268154575.

The spelling of 64445903 in words is "sixty-four million, four hundred forty-five thousand, nine hundred three".