981895459 has 2 divisors, whose sum is σ = 981895460. Its totient is φ = 981895458.

The previous prime is 981895403. The next prime is 981895483. The reversal of 981895459 is 954598189.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 981895459 - 2¹³ = 981887267 is a prime.

It is not a weakly prime, because it can be changed into another prime (981895489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490947729 + 490947730.

It is an arithmetic number, because the mean of its divisors is an integer number (490947730).

Almost surely, 2^981895459 is an apocalyptic number.

981895459 is a deficient number, since it is larger than the sum of its proper divisors (1).

981895459 is an equidigital number, since it uses as much as digits as its factorization.

981895459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4665600, while the sum is 58.

The square root of 981895459 is about 31335.2111689071. The cubic root of 981895459 is about 993.9283628320.

The spelling of 981895459 in words is "nine hundred eighty-one million, eight hundred ninety-five thousand, four hundred fifty-nine".