65038989 has 4 divisors (see below), whose sum is σ = 86718656. Its totient is φ = 43359324.

The previous prime is 65038979. The next prime is 65039017. The reversal of 65038989 is 98983056.

65038989 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 not a de Polignac number, because 65038989 - 2⁷ = 65038861 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65038979) 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, 10839829 + ... + 10839834.

It is an arithmetic number, because the mean of its divisors is an integer number (21679664).

Almost surely, 2^65038989 is an apocalyptic number.

It is an amenable number.

65038989 is a deficient number, since it is larger than the sum of its proper divisors (21679667).

65038989 is a wasteful number, since it uses less digits than its factorization.

65038989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21679666.

The product of its (nonzero) digits is 466560, while the sum is 48.

The square root of 65038989 is about 8064.6753809437. The cubic root of 65038989 is about 402.1529516246.

The spelling of 65038989 in words is "sixty-five million, thirty-eight thousand, nine hundred eighty-nine".