65609963 has 4 divisors (see below), whose sum is σ = 67210248. Its totient is φ = 64009680.

The previous prime is 65609941. The next prime is 65609969. The reversal of 65609963 is 36990656.

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 65609963 - 2⁶ = 65609899 is a prime.

It is a super-2 number, since 2×65609963² = 8609334489722738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65609969) 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, 800081 + ... + 800162.

It is an arithmetic number, because the mean of its divisors is an integer number (16802562).

Almost surely, 2^65609963 is an apocalyptic number.

65609963 is a deficient number, since it is larger than the sum of its proper divisors (1600285).

65609963 is a wasteful number, since it uses less digits than its factorization.

65609963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1600284.

The product of its (nonzero) digits is 262440, while the sum is 44.

The square root of 65609963 is about 8099.9977160491. The cubic root of 65609963 is about 403.3263513730.

The spelling of 65609963 in words is "sixty-five million, six hundred nine thousand, nine hundred sixty-three".