1942744081 has 2 divisors, whose sum is σ = 1942744082. Its totient is φ = 1942744080.

The previous prime is 1942744073. The next prime is 1942744117. The reversal of 1942744081 is 1804472491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1455041025 + 487703056 = 38145^2 + 22084^2 .

It is an emirp because it is prime and its reverse (1804472491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1942744081 - 2³ = 1942744073 is a prime.

It is a super-2 number, since 2×1942744081² = 7548509128521069122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1942744021) 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, 971372040 + 971372041.

It is an arithmetic number, because the mean of its divisors is an integer number (971372041).

Almost surely, 2^1942744081 is an apocalyptic number.

It is an amenable number.

1942744081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1942744081 is an equidigital number, since it uses as much as digits as its factorization.

1942744081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 1942744081 is about 44076.5706583441. The cubic root of 1942744081 is about 1247.7814687715.

The spelling of 1942744081 in words is "one billion, nine hundred forty-two million, seven hundred forty-four thousand, eighty-one".