65038813 has 8 divisors (see below), whose sum is σ = 74380032. Its totient is φ = 55710096.

The previous prime is 65038811. The next prime is 65038817. The reversal of 65038813 is 31883056.

It is a happy number.

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 65038813 - 2¹ = 65038811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65038811) 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, 15231 + ... + 19027.

It is an arithmetic number, because the mean of its divisors is an integer number (9297504).

Almost surely, 2^65038813 is an apocalyptic number.

It is an amenable number.

65038813 is a deficient number, since it is larger than the sum of its proper divisors (9341219).

65038813 is a wasteful number, since it uses less digits than its factorization.

65038813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6251.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 65038813 is about 8064.6644691518. The cubic root of 65038813 is about 402.1525888730.

The spelling of 65038813 in words is "sixty-five million, thirty-eight thousand, eight hundred thirteen".