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940749309 = 3437313897
BaseRepresentation
bin111000000100101…
…011000111111101
32102120012000110000
4320010223013331
53411312434214
6233203304513
732212144233
oct7004530775
92376160400
10940749309
11443034975
1222307b139
1311cb932c6
148cd26953
15578ca809
hex3812b1fd

940749309 has 20 divisors (see below), whose sum is σ = 1443303004. Its totient is φ = 610213824.

The previous prime is 940749263. The next prime is 940749319. The reversal of 940749309 is 903947049.

It can be written as a sum of positive squares in 2 ways, for example, as 864536409 + 76212900 = 29403^2 + 8730^2 .

It is not a de Polignac number, because 940749309 - 28 = 940749053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (940749319) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 153952 + ... + 159945.

Almost surely, 2940749309 is an apocalyptic number.

It is an amenable number.

940749309 is a deficient number, since it is larger than the sum of its proper divisors (502553695).

940749309 is a wasteful number, since it uses less digits than its factorization.

940749309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313946 (or 313937 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 940749309 is about 30671.6368816534. The cubic root of 940749309 is about 979.8463277714.

The spelling of 940749309 in words is "nine hundred forty million, seven hundred forty-nine thousand, three hundred nine".

Divisors: 1 3 9 27 37 81 111 333 999 2997 313897 941691 2825073 8475219 11614189 25425657 34842567 104527701 313583103 940749309