616978293 has 8 divisors (see below), whose sum is σ = 844871328. Its totient is φ = 400202064.

The previous prime is 616978273. The next prime is 616978303. The reversal of 616978293 is 392879616.

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

It is not a de Polignac number, because 616978293 - 2¹⁷ = 616847221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616978223) 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, 2779071 + ... + 2779292.

It is an arithmetic number, because the mean of its divisors is an integer number (105608916).

Almost surely, 2^616978293 is an apocalyptic number.

It is an amenable number.

616978293 is a deficient number, since it is larger than the sum of its proper divisors (227893035).

616978293 is a wasteful number, since it uses less digits than its factorization.

616978293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5558403.

The product of its digits is 979776, while the sum is 51.

The square root of 616978293 is about 24839.0477474480. The cubic root of 616978293 is about 851.3143646899.

The spelling of 616978293 in words is "six hundred sixteen million, nine hundred seventy-eight thousand, two hundred ninety-three".