64905903 has 18 divisors (see below), whose sum is σ = 94776864. Its totient is φ = 42802992.

The previous prime is 64905889. The next prime is 64905923. The reversal of 64905903 is 30950946.

64905903 is a `hidden beast` number, since 64 + 9 + 0 + 590 + 3 = 666.

It is not a de Polignac number, because 64905903 - 2⁴ = 64905887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64905923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 106626 + ... + 107232.

Almost surely, 2^64905903 is an apocalyptic number.

64905903 is a deficient number, since it is larger than the sum of its proper divisors (29870961).

64905903 is a wasteful number, since it uses less digits than its factorization.

64905903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831 (or 719 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 64905903 is about 8056.4199865697. The cubic root of 64905903 is about 401.8784625536.

The spelling of 64905903 in words is "sixty-four million, nine hundred five thousand, nine hundred three".