981977873 has 2 divisors, whose sum is σ = 981977874. Its totient is φ = 981977872.

The previous prime is 981977837. The next prime is 981977879. The reversal of 981977873 is 378779189.

981977873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (981977837) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 874503184 + 107474689 = 29572^2 + 10367^2 .

It is a cyclic number.

It is not a de Polignac number, because 981977873 - 2⁶ = 981977809 is a prime.

It is not a weakly prime, because it can be changed into another prime (981977879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490988936 + 490988937.

It is an arithmetic number, because the mean of its divisors is an integer number (490988937).

Almost surely, 2^981977873 is an apocalyptic number.

It is an amenable number.

981977873 is a deficient number, since it is larger than the sum of its proper divisors (1).

981977873 is an equidigital number, since it uses as much as digits as its factorization.

981977873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5334336, while the sum is 59.

The square root of 981977873 is about 31336.5261795241. The cubic root of 981977873 is about 993.9561700422.

The spelling of 981977873 in words is "nine hundred eighty-one million, nine hundred seventy-seven thousand, eight hundred seventy-three".