65503869 has 4 divisors (see below), whose sum is σ = 87338496. Its totient is φ = 43669244.

The previous prime is 65503843. The next prime is 65503871. The reversal of 65503869 is 96830556.

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 a cyclic number.

It is not a de Polignac number, because 65503869 - 2¹² = 65499773 is a prime.

It is a super-2 number, since 2×65503869² = 8581513707938322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 65503869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65503829) 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, 10917309 + ... + 10917314.

It is an arithmetic number, because the mean of its divisors is an integer number (21834624).

Almost surely, 2^65503869 is an apocalyptic number.

It is an amenable number.

65503869 is a deficient number, since it is larger than the sum of its proper divisors (21834627).

65503869 is a wasteful number, since it uses less digits than its factorization.

65503869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21834626.

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 65503869 is about 8093.4460522079. The cubic root of 65503869 is about 403.1088356718.

The spelling of 65503869 in words is "sixty-five million, five hundred three thousand, eight hundred sixty-nine".