65072869 has 4 divisors (see below), whose sum is σ = 65357260. Its totient is φ = 64788480.

The previous prime is 65072851. The next prime is 65072893. The reversal of 65072869 is 96827056.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36844900 + 28227969 = 6070^2 + 5313^2 .

It is a cyclic number.

It is not a de Polignac number, because 65072869 - 2¹¹ = 65070821 is a prime.

It is a super-2 number, since 2×65072869² = 8468956559782322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65072369) 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, 141852 + ... + 142309.

It is an arithmetic number, because the mean of its divisors is an integer number (16339315).

Almost surely, 2^65072869 is an apocalyptic number.

It is an amenable number.

65072869 is a deficient number, since it is larger than the sum of its proper divisors (284391).

65072869 is a wasteful number, since it uses less digits than its factorization.

65072869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284390.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 65072869 is about 8066.7756259859. The cubic root of 65072869 is about 402.2227691144. Note that the first 3 decimals are identical.

The spelling of 65072869 in words is "sixty-five million, seventy-two thousand, eight hundred sixty-nine".