775613 has 2 divisors, whose sum is σ = 775614. Its totient is φ = 775612.

The previous prime is 775603. The next prime is 775627. The reversal of 775613 is 316577.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 597529 + 178084 = 773^2 + 422^2 .

It is an emirp because it is prime and its reverse (316577) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 775613 - 2¹⁰ = 774589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (775603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387806 + 387807.

It is an arithmetic number, because the mean of its divisors is an integer number (387807).

2⁷⁷⁵⁶¹³ is an apocalyptic number.

It is an amenable number.

775613 is a deficient number, since it is larger than the sum of its proper divisors (1).

775613 is an equidigital number, since it uses as much as digits as its factorization.

775613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4410, while the sum is 29.

The square root of 775613 is about 880.6889348686. The cubic root of 775613 is about 91.8787391077.

The spelling of 775613 in words is "seven hundred seventy-five thousand, six hundred thirteen".