65709249 has 4 divisors (see below), whose sum is σ = 87612336. Its totient is φ = 43806164.

The previous prime is 65709227. The next prime is 65709251. The reversal of 65709249 is 94290756.

65709249 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 not a de Polignac number, because 65709249 - 2⁷ = 65709121 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 65709249.

It is not an unprimeable number, because it can be changed into a prime (65709209) 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, 10951539 + ... + 10951544.

It is an arithmetic number, because the mean of its divisors is an integer number (21903084).

Almost surely, 2^65709249 is an apocalyptic number.

It is an amenable number.

65709249 is a deficient number, since it is larger than the sum of its proper divisors (21903087).

65709249 is a wasteful number, since it uses less digits than its factorization.

65709249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21903086.

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 65709249 is about 8106.1241663325. The cubic root of 65709249 is about 403.5296969002.

The spelling of 65709249 in words is "sixty-five million, seven hundred nine thousand, two hundred forty-nine".