1981044029 has 2 divisors, whose sum is σ = 1981044030. Its totient is φ = 1981044028.

The previous prime is 1981043989. The next prime is 1981044049. The reversal of 1981044029 is 9204401891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1521156004 + 459888025 = 39002^2 + 21445^2 .

It is a cyclic number.

It is not a de Polignac number, because 1981044029 - 2²⁴ = 1964266813 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1981043983 and 1981044001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1981044049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 990522014 + 990522015.

It is an arithmetic number, because the mean of its divisors is an integer number (990522015).

Almost surely, 2^1981044029 is an apocalyptic number.

It is an amenable number.

1981044029 is a deficient number, since it is larger than the sum of its proper divisors (1).

1981044029 is an equidigital number, since it uses as much as digits as its factorization.

1981044029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 1981044029 is about 44508.9207799965. The cubic root of 1981044029 is about 1255.9279030535.

The spelling of 1981044029 in words is "one billion, nine hundred eighty-one million, forty-four thousand, twenty-nine".