616501 has 2 divisors, whose sum is σ = 616502. Its totient is φ = 616500.

The previous prime is 616489. The next prime is 616507. The reversal of 616501 is 105616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 600625 + 15876 = 775^2 + 126^2 .

It is a cyclic number.

It is not a de Polignac number, because 616501 - 2¹⁵ = 583733 is a prime.

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

616501 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308250 + 308251.

It is an arithmetic number, because the mean of its divisors is an integer number (308251).

2⁶¹⁶⁵⁰¹ is an apocalyptic number.

It is an amenable number.

616501 is a deficient number, since it is larger than the sum of its proper divisors (1).

616501 is an equidigital number, since it uses as much as digits as its factorization.

616501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 616501 is about 785.1757764985. The cubic root of 616501 is about 85.1094783107.

The spelling of 616501 in words is "six hundred sixteen thousand, five hundred one".