65853609 has 4 divisors (see below), whose sum is σ = 87804816. Its totient is φ = 43902404.

The previous prime is 65853589. The next prime is 65853629. The reversal of 65853609 is 90635856.

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 an interprime number because it is at equal distance from previous prime (65853589) and next prime (65853629).

It is a cyclic number.

It is not a de Polignac number, because 65853609 - 2⁷ = 65853481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65853629) 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, 10975599 + ... + 10975604.

It is an arithmetic number, because the mean of its divisors is an integer number (21951204).

Almost surely, 2^65853609 is an apocalyptic number.

It is an amenable number.

65853609 is a deficient number, since it is larger than the sum of its proper divisors (21951207).

65853609 is a wasteful number, since it uses less digits than its factorization.

65853609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21951206.

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 65853609 is about 8115.0236598546. The cubic root of 65853609 is about 403.8249924122.

The spelling of 65853609 in words is "sixty-five million, eight hundred fifty-three thousand, six hundred nine".