2042737981 has 2 divisors, whose sum is σ = 2042737982. Its totient is φ = 2042737980.

The previous prime is 2042737973. The next prime is 2042737993. The reversal of 2042737981 is 1897372402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1181021956 + 861716025 = 34366^2 + 29355^2 .

It is a cyclic number.

It is not a de Polignac number, because 2042737981 - 2³ = 2042737973 is a prime.

It is a super-2 number, since 2×2042737981² = 8345556918039912722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2042737381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1021368990 + 1021368991.

It is an arithmetic number, because the mean of its divisors is an integer number (1021368991).

Almost surely, 2^2042737981 is an apocalyptic number.

It is an amenable number.

2042737981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2042737981 is an equidigital number, since it uses as much as digits as its factorization.

2042737981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 2042737981 is about 45196.6589583788. The cubic root of 2042737981 is about 1268.8322870716.

The spelling of 2042737981 in words is "two billion, forty-two million, seven hundred thirty-seven thousand, nine hundred eighty-one".