203020128977 has 2 divisors, whose sum is σ = 203020128978. Its totient is φ = 203020128976.

The previous prime is 203020128973. The next prime is 203020128979. The reversal of 203020128977 is 779821020302.

203020128977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111717046081 + 91303082896 = 334241^2 + 302164^2 .

It is a cyclic number.

It is not a de Polignac number, because 203020128977 - 2² = 203020128973 is a prime.

Together with 203020128979, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (203020128973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101510064488 + 101510064489.

It is an arithmetic number, because the mean of its divisors is an integer number (101510064489).

Almost surely, 2^203020128977 is an apocalyptic number.

It is an amenable number.

203020128977 is a deficient number, since it is larger than the sum of its proper divisors (1).

203020128977 is an equidigital number, since it uses as much as digits as its factorization.

203020128977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 41.

The spelling of 203020128977 in words is "two hundred three billion, twenty million, one hundred twenty-eight thousand, nine hundred seventy-seven".