616765 has 8 divisors (see below), whose sum is σ = 744408. Its totient is φ = 490560.

The previous prime is 616757. The next prime is 616769. The reversal of 616765 is 567616.

It can be written as a sum of positive squares in 4 ways, for example, as 34596 + 582169 = 186^2 + 763^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 616765 - 2³ = 616757 is a prime.

It is an Ulam number.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1255 + ... + 1675.

It is an arithmetic number, because the mean of its divisors is an integer number (93051).

2⁶¹⁶⁷⁶⁵ is an apocalyptic number.

It is an amenable number.

616765 is a deficient number, since it is larger than the sum of its proper divisors (127643).

616765 is a wasteful number, since it uses less digits than its factorization.

616765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719.

The product of its digits is 7560, while the sum is 31.

The square root of 616765 is about 785.3438737267. The cubic root of 616765 is about 85.1216251933.

The spelling of 616765 in words is "six hundred sixteen thousand, seven hundred sixty-five".