617688813 has 8 divisors (see below), whose sum is σ = 941240128. Its totient is φ = 352965024.

The previous prime is 617688811. The next prime is 617688817. The reversal of 617688813 is 318886716.

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

It is not a de Polignac number, because 617688813 - 2¹ = 617688811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (617688811) 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, 14706856 + ... + 14706897.

It is an arithmetic number, because the mean of its divisors is an integer number (117655016).

Almost surely, 2^617688813 is an apocalyptic number.

It is an amenable number.

617688813 is a deficient number, since it is larger than the sum of its proper divisors (323551315).

617688813 is a wasteful number, since it uses less digits than its factorization.

617688813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29413763.

The product of its digits is 387072, while the sum is 48.

The square root of 617688813 is about 24853.3461127471. The cubic root of 617688813 is about 851.6410341170.

The spelling of 617688813 in words is "six hundred seventeen million, six hundred eighty-eight thousand, eight hundred thirteen".