616999999 has 8 divisors (see below), whose sum is σ = 769246848. Its totient is φ = 480779160.

The previous prime is 616999997. The next prime is 617000009. The reversal of 616999999 is 999999616.

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

It is a cyclic number.

It is not a de Polignac number, because 616999999 - 2¹ = 616999997 is a prime.

It is a Duffinian number.

616999999 is a modest number, since divided by 99999 gives 6169 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616999997) 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, 4006417 + ... + 4006570.

It is an arithmetic number, because the mean of its divisors is an integer number (96155856).

Almost surely, 2^616999999 is an apocalyptic number.

616999999 is a deficient number, since it is larger than the sum of its proper divisors (152246849).

616999999 is a wasteful number, since it uses less digits than its factorization.

616999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8013005.

The product of its digits is 19131876, while the sum is 67.

The square root of 616999999 is about 24839.4846766192. The cubic root of 616999999 is about 851.3243479762.

The spelling of 616999999 in words is "six hundred sixteen million, nine hundred ninety-nine thousand, nine hundred ninety-nine".