128303977 has 2 divisors, whose sum is σ = 128303978. Its totient is φ = 128303976.

The previous prime is 128303971. The next prime is 128303999. The reversal of 128303977 is 779303821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117961321 + 10342656 = 10861^2 + 3216^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128303977 is a prime.

It is equal to p_7287286 and since 128303977 and 7287286 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (128303971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64151988 + 64151989.

It is an arithmetic number, because the mean of its divisors is an integer number (64151989).

Almost surely, 2^128303977 is an apocalyptic number.

It is an amenable number.

128303977 is a deficient number, since it is larger than the sum of its proper divisors (1).

128303977 is an equidigital number, since it uses as much as digits as its factorization.

128303977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 128303977 is about 11327.1345449765. The cubic root of 128303977 is about 504.3670493801.

It can be divided in two parts, 12830 and 3977, that added together give a 5-th power (16807 = 7⁵).

The spelling of 128303977 in words is "one hundred twenty-eight million, three hundred three thousand, nine hundred seventy-seven".