765336749 has 4 divisors (see below), whose sum is σ = 786021564. Its totient is φ = 744651936.

The previous prime is 765336727. The next prime is 765336769. The reversal of 765336749 is 947633567.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 947633567 = 17 ⋅55743151.

It can be written as a sum of positive squares in 2 ways, for example, as 705274249 + 60062500 = 26557^2 + 7750^2 .

It is not a de Polignac number, because 765336749 - 2⁸ = 765336493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 765336697 and 765336706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (765336769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10342352 + ... + 10342425.

It is an arithmetic number, because the mean of its divisors is an integer number (196505391).

Almost surely, 2^765336749 is an apocalyptic number.

It is an amenable number.

765336749 is a deficient number, since it is larger than the sum of its proper divisors (20684815).

765336749 is a wasteful number, since it uses less digits than its factorization.

765336749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20684814.

The product of its digits is 2857680, while the sum is 50.

The square root of 765336749 is about 27664.7202949894. The cubic root of 765336749 is about 914.7116050914.

The spelling of 765336749 in words is "seven hundred sixty-five million, three hundred thirty-six thousand, seven hundred forty-nine".