616791893 has 4 divisors (see below), whose sum is σ = 617339340. Its totient is φ = 616244448.

The previous prime is 616791859. The next prime is 616791919. The reversal of 616791893 is 398197616.

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 387026929 + 229764964 = 19673^2 + 15158^2 .

It is a cyclic number.

It is not a de Polignac number, because 616791893 - 2⁶ = 616791829 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 (616796893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272030 + ... + 274287.

It is an arithmetic number, because the mean of its divisors is an integer number (154334835).

Almost surely, 2^616791893 is an apocalyptic number.

It is an amenable number.

616791893 is a deficient number, since it is larger than the sum of its proper divisors (547447).

616791893 is a wasteful number, since it uses less digits than its factorization.

616791893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547446.

The product of its digits is 489888, while the sum is 50.

The square root of 616791893 is about 24835.2953072839. The cubic root of 616791893 is about 851.2286237043.

The spelling of 616791893 in words is "six hundred sixteen million, seven hundred ninety-one thousand, eight hundred ninety-three".