613128523 has 12 divisors (see below), whose sum is σ = 723280752. Its totient is φ = 518133840.

The previous prime is 613128491. The next prime is 613128541. The reversal of 613128523 is 325821316.

It is not a de Polignac number, because 613128523 - 2⁵ = 613128491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (613128563) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84640 + ... + 91597.

It is an arithmetic number, because the mean of its divisors is an integer number (60273396).

Almost surely, 2^613128523 is an apocalyptic number.

613128523 is a deficient number, since it is larger than the sum of its proper divisors (110152229).

613128523 is a wasteful number, since it uses less digits than its factorization.

613128523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176322 (or 176315 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 613128523 is about 24761.4321677887. The cubic root of 613128523 is about 849.5400154803.

Adding to 613128523 its reverse (325821316), we get a palindrome (938949839).

The spelling of 613128523 in words is "six hundred thirteen million, one hundred twenty-eight thousand, five hundred twenty-three".