65216939 has 8 divisors (see below), whose sum is σ = 66854832. Its totient is φ = 63584640.

The previous prime is 65216917. The next prime is 65216941. The reversal of 65216939 is 93961256.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65216939 - 2²⁴ = 48439723 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65216896 and 65216905.

It is not an unprimeable number, because it can be changed into a prime (65216999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31727 + ... + 33719.

It is an arithmetic number, because the mean of its divisors is an integer number (8356854).

Almost surely, 2^65216939 is an apocalyptic number.

65216939 is a deficient number, since it is larger than the sum of its proper divisors (1637893).

65216939 is a wasteful number, since it uses less digits than its factorization.

65216939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2797.

The product of its digits is 87480, while the sum is 41.

The square root of 65216939 is about 8075.7005268893. The cubic root of 65216939 is about 402.5193879786.

The spelling of 65216939 in words is "sixty-five million, two hundred sixteen thousand, nine hundred thirty-nine".