65493121 has 4 divisors (see below), whose sum is σ = 68340672. Its totient is φ = 62645572.

The previous prime is 65493101. The next prime is 65493143. The reversal of 65493121 is 12139456.

65493121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65493121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65493101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1423741 + ... + 1423786.

It is an arithmetic number, because the mean of its divisors is an integer number (17085168).

Almost surely, 2^65493121 is an apocalyptic number.

It is an amenable number.

65493121 is a deficient number, since it is larger than the sum of its proper divisors (2847551).

65493121 is a wasteful number, since it uses less digits than its factorization.

65493121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2847550.

The product of its digits is 6480, while the sum is 31.

The square root of 65493121 is about 8092.7820309211. The cubic root of 65493121 is about 403.0867868431.

The spelling of 65493121 in words is "sixty-five million, four hundred ninety-three thousand, one hundred twenty-one".