765649 has 2 divisors, whose sum is σ = 765650. Its totient is φ = 765648.

The previous prime is 765623. The next prime is 765659. The reversal of 765649 is 946567.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 748225 + 17424 = 865^2 + 132^2 .

It is a cyclic number.

It is not a de Polignac number, because 765649 - 2⁷ = 765521 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (765619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382824 + 382825.

It is an arithmetic number, because the mean of its divisors is an integer number (382825).

2⁷⁶⁵⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

765649 is a deficient number, since it is larger than the sum of its proper divisors (1).

765649 is an equidigital number, since it uses as much as digits as its factorization.

765649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 37.

The square root of 765649 is about 875.0137141782. The cubic root of 765649 is about 91.4835986409.

It can be divided in two parts, 7 and 65649, that added together give a palindrome (65656).

The spelling of 765649 in words is "seven hundred sixty-five thousand, six hundred forty-nine".