1940812369 has 8 divisors (see below), whose sum is σ = 1949025960. Its totient is φ = 1932610176.

The previous prime is 1940812351. The next prime is 1940812387. The reversal of 1940812369 is 9632180491.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1940812351) and next prime (1940812387).

It can be written as a sum of positive squares in 4 ways, for example, as 437311744 + 1503500625 = 20912^2 + 38775^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1940812369 - 2⁷ = 1940812241 is a prime.

It is a super-2 number, since 2×1940812369² = 7533505303326784322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1940812309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 548197 + ... + 551725.

It is an arithmetic number, because the mean of its divisors is an integer number (243628245).

Almost surely, 2^1940812369 is an apocalyptic number.

It is an amenable number.

1940812369 is a deficient number, since it is larger than the sum of its proper divisors (8213591).

1940812369 is a wasteful number, since it uses less digits than its factorization.

1940812369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5699.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 1940812369 is about 44054.6520699006. The cubic root of 1940812369 is about 1247.3677663542.

The spelling of 1940812369 in words is "one billion, nine hundred forty million, eight hundred twelve thousand, three hundred sixty-nine".