616729 has 2 divisors, whose sum is σ = 616730. Its totient is φ = 616728.

The previous prime is 616723. The next prime is 616741. The reversal of 616729 is 927616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 416025 + 200704 = 645^2 + 448^2 .

It is a cyclic number.

It is not a de Polignac number, because 616729 - 2¹⁷ = 485657 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 616729.

It is not a weakly prime, because it can be changed into another prime (616723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308364 + 308365.

It is an arithmetic number, because the mean of its divisors is an integer number (308365).

2⁶¹⁶⁷²⁹ is an apocalyptic number.

It is an amenable number.

616729 is a deficient number, since it is larger than the sum of its proper divisors (1).

616729 is an equidigital number, since it uses as much as digits as its factorization.

616729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 31.

The square root of 616729 is about 785.3209534961. The cubic root of 616729 is about 85.1199690044.

The spelling of 616729 in words is "six hundred sixteen thousand, seven hundred twenty-nine".