765511049 has 2 divisors, whose sum is σ = 765511050. Its totient is φ = 765511048.

The previous prime is 765510997. The next prime is 765511051. The reversal of 765511049 is 940115567.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 510534025 + 254977024 = 22595^2 + 15968^2 .

It is a cyclic number.

It is not a de Polignac number, because 765511049 - 2⁸ = 765510793 is a prime.

It is a super-2 number, since 2×765511049² = 1172014332282160802, which contains 22 as substring.

Together with 765511051, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (765511249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382755524 + 382755525.

It is an arithmetic number, because the mean of its divisors is an integer number (382755525).

Almost surely, 2^765511049 is an apocalyptic number.

It is an amenable number.

765511049 is a deficient number, since it is larger than the sum of its proper divisors (1).

765511049 is an equidigital number, since it uses as much as digits as its factorization.

765511049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 765511049 is about 27667.8703372703. The cubic root of 765511049 is about 914.7810395075.

The spelling of 765511049 in words is "seven hundred sixty-five million, five hundred eleven thousand, forty-nine".