940539009 has 4 divisors (see below), whose sum is σ = 1254052016. Its totient is φ = 627026004.

The previous prime is 940538909. The next prime is 940539037. The reversal of 940539009 is 900935049.

It is a happy number.

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 not a de Polignac number, because 940539009 - 2²¹ = 938441857 is a prime.

It is a super-2 number, since 2×940539009² = 1769227254901404162, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (940539079) 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, 156756499 + ... + 156756504.

It is an arithmetic number, because the mean of its divisors is an integer number (313513004).

Almost surely, 2^940539009 is an apocalyptic number.

It is an amenable number.

940539009 is a deficient number, since it is larger than the sum of its proper divisors (313513007).

940539009 is a wasteful number, since it uses less digits than its factorization.

940539009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313513006.

The product of its (nonzero) digits is 43740, while the sum is 39.

The square root of 940539009 is about 30668.2084413159. The cubic root of 940539009 is about 979.7733090131.

The spelling of 940539009 in words is "nine hundred forty million, five hundred thirty-nine thousand, nine".