617652121 has 4 divisors (see below), whose sum is σ = 638950500. Its totient is φ = 596353744.

The previous prime is 617652083. The next prime is 617652127. The reversal of 617652121 is 121256716.

617652121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 465006096 + 152646025 = 21564^2 + 12355^2 .

It is a cyclic number.

It is not a de Polignac number, because 617652121 - 2²³ = 609263513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (617652127) 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, 10649146 + ... + 10649203.

It is an arithmetic number, because the mean of its divisors is an integer number (159737625).

Almost surely, 2^617652121 is an apocalyptic number.

It is an amenable number.

617652121 is a deficient number, since it is larger than the sum of its proper divisors (21298379).

617652121 is a wasteful number, since it uses less digits than its factorization.

617652121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21298378.

The product of its digits is 5040, while the sum is 31.

The square root of 617652121 is about 24852.6079315632. The cubic root of 617652121 is about 851.6241707003.

The spelling of 617652121 in words is "six hundred seventeen million, six hundred fifty-two thousand, one hundred twenty-one".