616487869 has 2 divisors, whose sum is σ = 616487870. Its totient is φ = 616487868.

The previous prime is 616487803. The next prime is 616487939. The reversal of 616487869 is 968784616.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 544662244 + 71825625 = 23338^2 + 8475^2 .

It is a cyclic number.

It is not a de Polignac number, because 616487869 - 2¹⁵ = 616455101 is a prime.

It is a super-3 number, since 3×616487869³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616487369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308243934 + 308243935.

It is an arithmetic number, because the mean of its divisors is an integer number (308243935).

Almost surely, 2^616487869 is an apocalyptic number.

It is an amenable number.

616487869 is a deficient number, since it is larger than the sum of its proper divisors (1).

616487869 is an equidigital number, since it uses as much as digits as its factorization.

616487869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3483648, while the sum is 55.

The square root of 616487869 is about 24829.1737478314. The cubic root of 616487869 is about 851.0887405084.

The spelling of 616487869 in words is "six hundred sixteen million, four hundred eighty-seven thousand, eight hundred sixty-nine".