981487933 has 2 divisors, whose sum is σ = 981487934. Its totient is φ = 981487932.

The previous prime is 981487909. The next prime is 981487957. The reversal of 981487933 is 339784189.

It is a balanced prime because it is at equal distance from previous prime (981487909) and next prime (981487957).

It can be written as a sum of positive squares in only one way, i.e., 981130329 + 357604 = 31323^2 + 598^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-981487933 is a prime.

It is a super-2 number, since 2×981487933² = 1926637125249224978, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981487433) 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, 490743966 + 490743967.

It is an arithmetic number, because the mean of its divisors is an integer number (490743967).

Almost surely, 2^981487933 is an apocalyptic number.

It is an amenable number.

981487933 is a deficient number, since it is larger than the sum of its proper divisors (1).

981487933 is an equidigital number, since it uses as much as digits as its factorization.

981487933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 52.

The square root of 981487933 is about 31328.7078092921. The cubic root of 981487933 is about 993.7908370914.

The spelling of 981487933 in words is "nine hundred eighty-one million, four hundred eighty-seven thousand, nine hundred thirty-three".