940912309 has 4 divisors (see below), whose sum is σ = 941031904. Its totient is φ = 940792716.

The previous prime is 940912237. The next prime is 940912333. The reversal of 940912309 is 903219049.

940912309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 903219049 = 211 ⋅4280659.

It is a cyclic number.

It is not a de Polignac number, because 940912309 - 2²³ = 932523701 is a prime.

It is a super-2 number, since 2×940912309² = 1770631946455422962, 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 (940912409) 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, 47097 + ... + 64030.

It is an arithmetic number, because the mean of its divisors is an integer number (235257976).

Almost surely, 2^940912309 is an apocalyptic number.

It is an amenable number.

940912309 is a deficient number, since it is larger than the sum of its proper divisors (119595).

940912309 is a wasteful number, since it uses less digits than its factorization.

940912309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119594.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 940912309 is about 30674.2939446045. The cubic root of 940912309 is about 979.9029158998.

The spelling of 940912309 in words is "nine hundred forty million, nine hundred twelve thousand, three hundred nine".