1461982981 has 2 divisors, whose sum is σ = 1461982982. Its totient is φ = 1461982980.

The previous prime is 1461982969. The next prime is 1461982993. The reversal of 1461982981 is 1892891641.

It is a balanced prime because it is at equal distance from previous prime (1461982969) and next prime (1461982993).

It can be written as a sum of positive squares in only one way, i.e., 840478081 + 621504900 = 28991^2 + 24930^2 .

It is a cyclic number.

It is not a de Polignac number, because 1461982981 - 2⁷ = 1461982853 is a prime.

It is a super-2 number, since 2×1461982981² = 4274788473467292722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1461982931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 730991490 + 730991491.

It is an arithmetic number, because the mean of its divisors is an integer number (730991491).

Almost surely, 2^1461982981 is an apocalyptic number.

It is an amenable number.

1461982981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1461982981 is an equidigital number, since it uses as much as digits as its factorization.

1461982981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 49.

The square root of 1461982981 is about 38235.8860365495. The cubic root of 1461982981 is about 1134.9605660774.

The spelling of 1461982981 in words is "one billion, four hundred sixty-one million, nine hundred eighty-two thousand, nine hundred eighty-one".