1940069942 has 4 divisors (see below), whose sum is σ = 2910104916. Its totient is φ = 970034970.

The previous prime is 1940069933. The next prime is 1940069947. The reversal of 1940069942 is 2499600491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2499600491 = 17 ⋅147035323.

It is a junction number, because it is equal to n+sod(n) for n = 1940069893 and 1940069902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1940069947) 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 as a sum of consecutive naturals, namely, 485017484 + ... + 485017487.

It is an arithmetic number, because the mean of its divisors is an integer number (727526229).

Almost surely, 2^1940069942 is an apocalyptic number.

1940069942 is a deficient number, since it is larger than the sum of its proper divisors (970034974).

1940069942 is an equidigital number, since it uses as much as digits as its factorization.

1940069942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970034973.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 1940069942 is about 44046.2250595894. The cubic root of 1940069942 is about 1247.2086924815.

The spelling of 1940069942 in words is "one billion, nine hundred forty million, sixty-nine thousand, nine hundred forty-two".