981481663 has 2 divisors, whose sum is σ = 981481664. Its totient is φ = 981481662.

The previous prime is 981481609. The next prime is 981481667. The reversal of 981481663 is 366184189.

981481663 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-981481663 is a prime.

It is equal to p_49953178 and since 981481663 and 49953178 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981481667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490740831 + 490740832.

It is an arithmetic number, because the mean of its divisors is an integer number (490740832).

Almost surely, 2^981481663 is an apocalyptic number.

981481663 is a deficient number, since it is larger than the sum of its proper divisors (1).

981481663 is an equidigital number, since it uses as much as digits as its factorization.

981481663 is an odious number, because the sum of its binary digits is odd.

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

The square root of 981481663 is about 31328.6077411685. The cubic root of 981481663 is about 993.7887208888.

The spelling of 981481663 in words is "nine hundred eighty-one million, four hundred eighty-one thousand, six hundred sixty-three".