1982001949 has 2 divisors, whose sum is σ = 1982001950. Its totient is φ = 1982001948.

The previous prime is 1982001943. The next prime is 1982001961. The reversal of 1982001949 is 9491002891.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1176009849 + 805992100 = 34293^2 + 28390^2 .

It is a cyclic number.

It is not a de Polignac number, because 1982001949 - 2³ = 1982001941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1982001941) 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, 991000974 + 991000975.

It is an arithmetic number, because the mean of its divisors is an integer number (991000975).

Almost surely, 2^1982001949 is an apocalyptic number.

It is an amenable number.

1982001949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1982001949 is an equidigital number, since it uses as much as digits as its factorization.

1982001949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 43.

The square root of 1982001949 is about 44519.6804683053. The cubic root of 1982001949 is about 1256.1303021552.

The spelling of 1982001949 in words is "one billion, nine hundred eighty-two million, one thousand, nine hundred forty-nine".