765940619 has 2 divisors, whose sum is σ = 765940620. Its totient is φ = 765940618.

The previous prime is 765940607. The next prime is 765940691. The reversal of 765940619 is 916049567.

Together with next prime (765940691) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 765940619 - 2⁴ = 765940603 is a prime.

It is a super-2 number, since 2×765940619² = 1173330063668206322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (765940699) 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 as a sum of consecutive naturals, namely, 382970309 + 382970310.

It is an arithmetic number, because the mean of its divisors is an integer number (382970310).

Almost surely, 2^765940619 is an apocalyptic number.

765940619 is a deficient number, since it is larger than the sum of its proper divisors (1).

765940619 is an equidigital number, since it uses as much as digits as its factorization.

765940619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 765940619 is about 27675.6322240342. The cubic root of 765940619 is about 914.9521186885.

The spelling of 765940619 in words is "seven hundred sixty-five million, nine hundred forty thousand, six hundred nineteen".