65248409 has 4 divisors (see below), whose sum is σ = 65762304. Its totient is φ = 64734516.

The previous prime is 65248369. The next prime is 65248423. The reversal of 65248409 is 90484256.

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 not a de Polignac number, because 65248409 - 2²⁴ = 48471193 is a prime.

It is a super-3 number, since 3×65248409³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65248709) 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, 256757 + ... + 257010.

It is an arithmetic number, because the mean of its divisors is an integer number (16440576).

Almost surely, 2^65248409 is an apocalyptic number.

It is an amenable number.

65248409 is a deficient number, since it is larger than the sum of its proper divisors (513895).

65248409 is a wasteful number, since it uses less digits than its factorization.

65248409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513894.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 65248409 is about 8077.6487296738. The cubic root of 65248409 is about 402.5841219182.

The spelling of 65248409 in words is "sixty-five million, two hundred forty-eight thousand, four hundred nine".