981944461 has 2 divisors, whose sum is σ = 981944462. Its totient is φ = 981944460.

The previous prime is 981944449. The next prime is 981944473. The reversal of 981944461 is 164449189.

It is a balanced prime because it is at equal distance from previous prime (981944449) and next prime (981944473).

It can be written as a sum of positive squares in only one way, i.e., 827712900 + 154231561 = 28770^2 + 12419^2 .

It is an emirp because it is prime and its reverse (164449189) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 981944461 - 2²³ = 973555853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981944401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490972230 + 490972231.

It is an arithmetic number, because the mean of its divisors is an integer number (490972231).

Almost surely, 2^981944461 is an apocalyptic number.

It is an amenable number.

981944461 is a deficient number, since it is larger than the sum of its proper divisors (1).

981944461 is an equidigital number, since it uses as much as digits as its factorization.

981944461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 46.

The square root of 981944461 is about 31335.9930591006. The cubic root of 981944461 is about 993.9448967263.

The spelling of 981944461 in words is "nine hundred eighty-one million, nine hundred forty-four thousand, four hundred sixty-one".