128074773 has 4 divisors (see below), whose sum is σ = 170766368. Its totient is φ = 85383180.

The previous prime is 128074747. The next prime is 128074799. The reversal of 128074773 is 377470821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (128074747) and next prime (128074799).

It is not a de Polignac number, because 128074773 - 2⁸ = 128074517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128072773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21345793 + ... + 21345798.

It is an arithmetic number, because the mean of its divisors is an integer number (42691592).

Almost surely, 2^128074773 is an apocalyptic number.

It is an amenable number.

128074773 is a deficient number, since it is larger than the sum of its proper divisors (42691595).

128074773 is an equidigital number, since it uses as much as digits as its factorization.

128074773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42691594.

The product of its (nonzero) digits is 65856, while the sum is 39.

The square root of 128074773 is about 11317.0125474880. The cubic root of 128074773 is about 504.0665342687.

The spelling of 128074773 in words is "one hundred twenty-eight million, seventy-four thousand, seven hundred seventy-three".