940209505 has 16 divisors (see below), whose sum is σ = 1142060544. Its totient is φ = 742996800.

The previous prime is 940209481. The next prime is 940209511. The reversal of 940209505 is 505902049.

It is not a de Polignac number, because 940209505 - 2¹⁵ = 940176737 is a prime.

It is a super-3 number, since 3×940209505³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 244024 + ... + 247846.

It is an arithmetic number, because the mean of its divisors is an integer number (71378784).

Almost surely, 2^940209505 is an apocalyptic number.

It is an amenable number.

940209505 is a deficient number, since it is larger than the sum of its proper divisors (201851039).

940209505 is a wasteful number, since it uses less digits than its factorization.

940209505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4416.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 940209505 is about 30662.8358929829. The cubic root of 940209505 is about 979.6588792626.

The spelling of 940209505 in words is "nine hundred forty million, two hundred nine thousand, five hundred five".