981753977 has 2 divisors, whose sum is σ = 981753978. Its totient is φ = 981753976.

The previous prime is 981753917. The next prime is 981754003. The reversal of 981753977 is 779357189.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 981192976 + 561001 = 31324^2 + 749^2 .

It is a cyclic number.

It is not a de Polignac number, because 981753977 - 2¹⁶ = 981688441 is a prime.

It is not a weakly prime, because it can be changed into another prime (981753917) 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, 490876988 + 490876989.

It is an arithmetic number, because the mean of its divisors is an integer number (490876989).

Almost surely, 2^981753977 is an apocalyptic number.

It is an amenable number.

981753977 is a deficient number, since it is larger than the sum of its proper divisors (1).

981753977 is an equidigital number, since it uses as much as digits as its factorization.

981753977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3333960, while the sum is 56.

The square root of 981753977 is about 31332.9535313861. The cubic root of 981753977 is about 993.8806219290.

The spelling of 981753977 in words is "nine hundred eighty-one million, seven hundred fifty-three thousand, nine hundred seventy-seven".