1940565769 has 8 divisors (see below), whose sum is σ = 2011014720. Its totient is φ = 1870352400.

The previous prime is 1940565721. The next prime is 1940565773. The reversal of 1940565769 is 9675650491.

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 1940565769 - 2²³ = 1932177161 is a prime.

It is a super-2 number, since 2×1940565769² = 7531591007629122722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1940565709) 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, 42037 + ... + 75154.

It is an arithmetic number, because the mean of its divisors is an integer number (251376840).

Almost surely, 2^1940565769 is an apocalyptic number.

It is an amenable number.

1940565769 is a deficient number, since it is larger than the sum of its proper divisors (70448951).

1940565769 is a wasteful number, since it uses less digits than its factorization.

1940565769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117791.

The product of its (nonzero) digits is 2041200, while the sum is 52.

The square root of 1940565769 is about 44051.8531846278. The cubic root of 1940565769 is about 1247.3149338522.

The spelling of 1940565769 in words is "one billion, nine hundred forty million, five hundred sixty-five thousand, seven hundred sixty-nine".