128773513 has 8 divisors (see below), whose sum is σ = 140633856. Its totient is φ = 116938800.

The previous prime is 128773499. The next prime is 128773529. The reversal of 128773513 is 315377821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128773513 - 2¹³ = 128765321 is a prime.

It is a super-2 number, since 2×128773513² = 33165235300722338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128773553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4995 + ... + 16807.

It is an arithmetic number, because the mean of its divisors is an integer number (17579232).

Almost surely, 2^128773513 is an apocalyptic number.

It is an amenable number.

128773513 is a deficient number, since it is larger than the sum of its proper divisors (11860343).

128773513 is a wasteful number, since it uses less digits than its factorization.

128773513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12815.

The product of its digits is 35280, while the sum is 37.

The square root of 128773513 is about 11347.8417771839. The cubic root of 128773513 is about 504.9815540758.

It can be divided in two parts, 128773 and 513, that added together give a triangular number (129286 = T₅₀₈).

The spelling of 128773513 in words is "one hundred twenty-eight million, seven hundred seventy-three thousand, five hundred thirteen".