981905441 has 12 divisors (see below), whose sum is σ = 1087180836. Its totient is φ = 886110720.

The previous prime is 981905437. The next prime is 981905459. The reversal of 981905441 is 144509189.

It can be written as a sum of positive squares in 2 ways, for example, as 376942225 + 604963216 = 19415^2 + 24596^2 .

It is not a de Polignac number, because 981905441 - 2² = 981905437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (981935441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13040 + ... + 46193.

It is an arithmetic number, because the mean of its divisors is an integer number (90598403).

Almost surely, 2^981905441 is an apocalyptic number.

It is an amenable number.

981905441 is a deficient number, since it is larger than the sum of its proper divisors (105275395).

981905441 is a wasteful number, since it uses less digits than its factorization.

981905441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59392 (or 59381 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 981905441 is about 31335.3704461907. The cubic root of 981905441 is about 993.9317309296.

The spelling of 981905441 in words is "nine hundred eighty-one million, nine hundred five thousand, four hundred forty-one".