65448391 has 4 divisors (see below), whose sum is σ = 65703312. Its totient is φ = 65193472.

The previous prime is 65448371. The next prime is 65448401. The reversal of 65448391 is 19384456.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65448391 - 2⁵ = 65448359 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65448311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127075 + ... + 127588.

It is an arithmetic number, because the mean of its divisors is an integer number (16425828).

Almost surely, 2^65448391 is an apocalyptic number.

65448391 is a deficient number, since it is larger than the sum of its proper divisors (254921).

65448391 is a wasteful number, since it uses less digits than its factorization.

65448391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254920.

The product of its digits is 103680, while the sum is 40.

The square root of 65448391 is about 8090.0179851469. The cubic root of 65448391 is about 402.9950002150.

The spelling of 65448391 in words is "sixty-five million, four hundred forty-eight thousand, three hundred ninety-one".