64489903 has 2 divisors, whose sum is σ = 64489904. Its totient is φ = 64489902.

The previous prime is 64489883. The next prime is 64489937. The reversal of 64489903 is 30998446.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64489903 - 2⁹ = 64489391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64489903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64489963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32244951 + 32244952.

It is an arithmetic number, because the mean of its divisors is an integer number (32244952).

Almost surely, 2^64489903 is an apocalyptic number.

64489903 is a deficient number, since it is larger than the sum of its proper divisors (1).

64489903 is an equidigital number, since it uses as much as digits as its factorization.

64489903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 64489903 is about 8030.5605657389. The cubic root of 64489903 is about 401.0180380482.

The spelling of 64489903 in words is "sixty-four million, four hundred eighty-nine thousand, nine hundred three".