981481457 has 6 divisors (see below), whose sum is σ = 1078818594. Its totient is φ = 892255760.

The previous prime is 981481441. The next prime is 981481469. The reversal of 981481457 is 754184189.

981481457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 951352336 + 30129121 = 30844^2 + 5489^2 .

It is not a de Polignac number, because 981481457 - 2⁴ = 981481441 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981481477) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4055588 + ... + 4055829.

It is an arithmetic number, because the mean of its divisors is an integer number (179803099).

Almost surely, 2^981481457 is an apocalyptic number.

It is an amenable number.

981481457 is a deficient number, since it is larger than the sum of its proper divisors (97337137).

981481457 is a wasteful number, since it uses less digits than its factorization.

981481457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8111439 (or 8111428 counting only the distinct ones).

The product of its digits is 322560, while the sum is 47.

The square root of 981481457 is about 31328.6044534384. The cubic root of 981481457 is about 993.7886513611.

The spelling of 981481457 in words is "nine hundred eighty-one million, four hundred eighty-one thousand, four hundred fifty-seven".