128602613 has 4 divisors (see below), whose sum is σ = 129615360. Its totient is φ = 127589868.

The previous prime is 128602589. The next prime is 128602619. The reversal of 128602613 is 316206821.

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 a cyclic number.

It is not a de Polignac number, because 128602613 - 2¹⁰ = 128601589 is a prime.

It is a super-3 number, since 3×128602613³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128602619) 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, 506183 + ... + 506436.

It is an arithmetic number, because the mean of its divisors is an integer number (32403840).

Almost surely, 2^128602613 is an apocalyptic number.

It is an amenable number.

128602613 is a deficient number, since it is larger than the sum of its proper divisors (1012747).

128602613 is a wasteful number, since it uses less digits than its factorization.

128602613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012746.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 128602613 is about 11340.3092109519. The cubic root of 128602613 is about 504.7580620661.

The spelling of 128602613 in words is "one hundred twenty-eight million, six hundred two thousand, six hundred thirteen".