616949 has 6 divisors (see below), whose sum is σ = 651510. Its totient is φ = 584136.

The previous prime is 616943. The next prime is 616951. The reversal of 616949 is 949616.

It can be written as a sum of positive squares in only one way, i.e., 442225 + 174724 = 665^2 + 418^2 .

It is not a de Polignac number, because 616949 - 2⁴ = 616933 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616943) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 494 + ... + 1215.

It is an arithmetic number, because the mean of its divisors is an integer number (108585).

2⁶¹⁶⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

616949 is a deficient number, since it is larger than the sum of its proper divisors (34561).

616949 is a wasteful number, since it uses less digits than its factorization.

616949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1747 (or 1728 counting only the distinct ones).

The product of its digits is 11664, while the sum is 35.

The square root of 616949 is about 785.4610111266. The cubic root of 616949 is about 85.1300891527.

The spelling of 616949 in words is "six hundred sixteen thousand, nine hundred forty-nine".