65921903 has 16 divisors (see below), whose sum is σ = 73165824. Its totient is φ = 59114880.

The previous prime is 65921899. The next prime is 65921917. The reversal of 65921903 is 30912956.

It is a cyclic number.

It is not a de Polignac number, because 65921903 - 2² = 65921899 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65921953) 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 in 15 ways as a sum of consecutive naturals, for example, 34376 + ... + 36242.

It is an arithmetic number, because the mean of its divisors is an integer number (4572864).

Almost surely, 2^65921903 is an apocalyptic number.

65921903 is a deficient number, since it is larger than the sum of its proper divisors (7243921).

65921903 is a wasteful number, since it uses less digits than its factorization.

65921903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1982.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 65921903 is about 8119.2304438290. The cubic root of 65921903 is about 403.9645408051.

The spelling of 65921903 in words is "sixty-five million, nine hundred twenty-one thousand, nine hundred three".