765828139 has 2 divisors, whose sum is σ = 765828140. Its totient is φ = 765828138.

The previous prime is 765828137. The next prime is 765828149. The reversal of 765828139 is 931828567.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 765828139 - 2¹ = 765828137 is a prime.

It is a super-3 number, since 3×765828139³ (a number of 28 digits) contains 333 as substring.

Together with 765828137, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 765828092 and 765828101.

It is not a weakly prime, because it can be changed into another prime (765828137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382914069 + 382914070.

It is an arithmetic number, because the mean of its divisors is an integer number (382914070).

Almost surely, 2^765828139 is an apocalyptic number.

765828139 is a deficient number, since it is larger than the sum of its proper divisors (1).

765828139 is an equidigital number, since it uses as much as digits as its factorization.

765828139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 49.

The square root of 765828139 is about 27673.6000368582. The cubic root of 765828139 is about 914.9073289446.

The spelling of 765828139 in words is "seven hundred sixty-five million, eight hundred twenty-eight thousand, one hundred thirty-nine".