981824387 has 2 divisors, whose sum is σ = 981824388. Its totient is φ = 981824386.

The previous prime is 981824383. The next prime is 981824413. The reversal of 981824387 is 783428189.

981824387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 981824387 - 2² = 981824383 is a prime.

It is not a weakly prime, because it can be changed into another prime (981824383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490912193 + 490912194.

It is an arithmetic number, because the mean of its divisors is an integer number (490912194).

Almost surely, 2^981824387 is an apocalyptic number.

981824387 is a deficient number, since it is larger than the sum of its proper divisors (1).

981824387 is an equidigital number, since it uses as much as digits as its factorization.

981824387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 774144, while the sum is 50.

The square root of 981824387 is about 31334.0770886905. The cubic root of 981824387 is about 993.9043812630.

The spelling of 981824387 in words is "nine hundred eighty-one million, eight hundred twenty-four thousand, three hundred eighty-seven".