768505 has 4 divisors (see below), whose sum is σ = 922212. Its totient is φ = 614800.

The previous prime is 768503. The next prime is 768541. The reversal of 768505 is 505867.

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 484416 + 284089 = 696^2 + 533^2 .

It is not a de Polignac number, because 768505 - 2¹ = 768503 is a prime.

It is a Duffinian number.

768505 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (768503) 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, 76846 + ... + 76855.

It is an arithmetic number, because the mean of its divisors is an integer number (230553).

2⁷⁶⁸⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

768505 is a deficient number, since it is larger than the sum of its proper divisors (153707).

768505 is a wasteful number, since it uses less digits than its factorization.

768505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153706.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 768505 is about 876.6441695466. The cubic root of 768505 is about 91.5972072526.

The spelling of 768505 in words is "seven hundred sixty-eight thousand, five hundred five".