616771 has 4 divisors (see below), whose sum is σ = 626944. Its totient is φ = 606600.

The previous prime is 616769. The next prime is 616783. The reversal of 616771 is 177616.

616771 = 69² + 70² + ... + 129².

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 616771 - 2¹ = 616769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4995 + ... + 5116.

It is an arithmetic number, because the mean of its divisors is an integer number (156736).

2⁶¹⁶⁷⁷¹ is an apocalyptic number.

616771 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

616771 is a deficient number, since it is larger than the sum of its proper divisors (10173).

616771 is a wasteful number, since it uses less digits than its factorization.

616771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10172.

The product of its digits is 1764, while the sum is 28.

The square root of 616771 is about 785.3476937001. The cubic root of 616771 is about 85.1219012186.

The spelling of 616771 in words is "six hundred sixteen thousand, seven hundred seventy-one".