128073747 has 4 divisors (see below), whose sum is σ = 170765000. Its totient is φ = 85382496.

The previous prime is 128073727. The next prime is 128073763. The reversal of 128073747 is 747370821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 747370821 = 3 ⋅249123607.

It is not a de Polignac number, because 128073747 - 2¹⁰ = 128072723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128073707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21345622 + ... + 21345627.

It is an arithmetic number, because the mean of its divisors is an integer number (42691250).

Almost surely, 2^128073747 is an apocalyptic number.

128073747 is a deficient number, since it is larger than the sum of its proper divisors (42691253).

128073747 is an equidigital number, since it uses as much as digits as its factorization.

128073747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42691252.

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

The square root of 128073747 is about 11316.9672174130. The cubic root of 128073747 is about 504.0651882486.

The spelling of 128073747 in words is "one hundred twenty-eight million, seventy-three thousand, seven hundred forty-seven".