501506965 has 4 divisors (see below), whose sum is σ = 601808364. Its totient is φ = 401205568.

The previous prime is 501506963. The next prime is 501506989. The reversal of 501506965 is 569605105.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 569605105 = 5 ⋅113921021.

It can be written as a sum of positive squares in 2 ways, for example, as 175271121 + 326235844 = 13239^2 + 18062^2 .

It is a cyclic number.

It is not a de Polignac number, because 501506965 - 2¹ = 501506963 is a prime.

It is a super-2 number, since 2×501506965² = 503018471887022450, 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 (501506963) 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, 50150692 + ... + 50150701.

It is an arithmetic number, because the mean of its divisors is an integer number (150452091).

Almost surely, 2^501506965 is an apocalyptic number.

It is an amenable number.

501506965 is a deficient number, since it is larger than the sum of its proper divisors (100301399).

501506965 is a wasteful number, since it uses less digits than its factorization.

501506965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100301398.

The product of its (nonzero) digits is 40500, while the sum is 37.

The square root of 501506965 is about 22394.3511850645. The cubic root of 501506965 is about 794.4971121764.

The spelling of 501506965 in words is "five hundred one million, five hundred six thousand, nine hundred sixty-five".