981355163 has 2 divisors, whose sum is σ = 981355164. Its totient is φ = 981355162.

The previous prime is 981355139. The next prime is 981355217. The reversal of 981355163 is 361553189.

It is a weak prime.

It is an emirp because it is prime and its reverse (361553189) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 981355163 - 2¹² = 981351067 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 981355163.

It is not a weakly prime, because it can be changed into another prime (981355103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490677581 + 490677582.

It is an arithmetic number, because the mean of its divisors is an integer number (490677582).

Almost surely, 2^981355163 is an apocalyptic number.

981355163 is a deficient number, since it is larger than the sum of its proper divisors (1).

981355163 is an equidigital number, since it uses as much as digits as its factorization.

981355163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 41.

The square root of 981355163 is about 31326.5887546027. The cubic root of 981355163 is about 993.7460236488.

The spelling of 981355163 in words is "nine hundred eighty-one million, three hundred fifty-five thousand, one hundred sixty-three".