616481 has 2 divisors, whose sum is σ = 616482. Its totient is φ = 616480.

The previous prime is 616463. The next prime is 616489. The reversal of 616481 is 184616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 616225 + 256 = 785^2 + 16^2 .

It is a cyclic number.

It is not a de Polignac number, because 616481 - 2¹⁸ = 354337 is a prime.

It is a super-2 number, since 2×616481² = 760097646722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 616481.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 616481.

It is not a weakly prime, because it can be changed into another prime (616489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308240 + 308241.

It is an arithmetic number, because the mean of its divisors is an integer number (308241).

2⁶¹⁶⁴⁸¹ is an apocalyptic number.

It is an amenable number.

616481 is a deficient number, since it is larger than the sum of its proper divisors (1).

616481 is an equidigital number, since it uses as much as digits as its factorization.

616481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 26.

The square root of 616481 is about 785.1630403935. The cubic root of 616481 is about 85.1085579511.

The spelling of 616481 in words is "six hundred sixteen thousand, four hundred eighty-one".