128773019 has 2 divisors, whose sum is σ = 128773020. Its totient is φ = 128773018.

The previous prime is 128773009. The next prime is 128773031. The reversal of 128773019 is 910377821.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128773019 is a prime.

It is a super-2 number, since 2×128773019² = 33164980844748722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128773009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64386509 + 64386510.

It is an arithmetic number, because the mean of its divisors is an integer number (64386510).

Almost surely, 2^128773019 is an apocalyptic number.

128773019 is a deficient number, since it is larger than the sum of its proper divisors (1).

128773019 is an equidigital number, since it uses as much as digits as its factorization.

128773019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 128773019 is about 11347.8200109096. The cubic root of 128773019 is about 504.9809083394.

The spelling of 128773019 in words is "one hundred twenty-eight million, seven hundred seventy-three thousand, nineteen".