1980966461 has 2 divisors, whose sum is σ = 1980966462. Its totient is φ = 1980966460.

The previous prime is 1980966443. The next prime is 1980966479. The reversal of 1980966461 is 1646690891.

It is a balanced prime because it is at equal distance from previous prime (1980966443) and next prime (1980966479).

It can be written as a sum of positive squares in only one way, i.e., 1528340836 + 452625625 = 39094^2 + 21275^2 .

It is a cyclic number.

It is not a de Polignac number, because 1980966461 - 2²² = 1976772157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1980966161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 990483230 + 990483231.

It is an arithmetic number, because the mean of its divisors is an integer number (990483231).

Almost surely, 2^1980966461 is an apocalyptic number.

It is an amenable number.

1980966461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1980966461 is an equidigital number, since it uses as much as digits as its factorization.

1980966461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 1980966461 is about 44508.0493955869. The cubic root of 1980966461 is about 1255.9115108405.

The spelling of 1980966461 in words is "one billion, nine hundred eighty million, nine hundred sixty-six thousand, four hundred sixty-one".