775013 has 4 divisors (see below), whose sum is σ = 820620. Its totient is φ = 729408.

The previous prime is 775007. The next prime is 775037. The reversal of 775013 is 310577.

775013 = 622² + 623².

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 386884 + 388129 = 622^2 + 623^2 .

It is a cyclic number.

It is not a de Polignac number, because 775013 - 2⁴ = 774997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 775013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (775043) 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, 22778 + ... + 22811.

It is an arithmetic number, because the mean of its divisors is an integer number (205155).

2⁷⁷⁵⁰¹³ is an apocalyptic number.

775013 is the 623-rd centered square number.

It is an amenable number.

775013 is a deficient number, since it is larger than the sum of its proper divisors (45607).

775013 is a wasteful number, since it uses less digits than its factorization.

775013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45606.

The product of its (nonzero) digits is 735, while the sum is 23.

The square root of 775013 is about 880.3482265558. The cubic root of 775013 is about 91.8550410930.

The spelling of 775013 in words is "seven hundred seventy-five thousand, thirteen".