765338993 has 2 divisors, whose sum is σ = 765338994. Its totient is φ = 765338992.

The previous prime is 765338927. The next prime is 765339011. The reversal of 765338993 is 399833567.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 748952689 + 16386304 = 27367^2 + 4048^2 .

It is a cyclic number.

It is not a de Polignac number, because 765338993 - 2¹² = 765334897 is a prime.

It is not a weakly prime, because it can be changed into another prime (765338393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382669496 + 382669497.

It is an arithmetic number, because the mean of its divisors is an integer number (382669497).

Almost surely, 2^765338993 is an apocalyptic number.

It is an amenable number.

765338993 is a deficient number, since it is larger than the sum of its proper divisors (1).

765338993 is an equidigital number, since it uses as much as digits as its factorization.

765338993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3674160, while the sum is 53.

The square root of 765338993 is about 27664.7608520298. The cubic root of 765338993 is about 914.7124990817.

The spelling of 765338993 in words is "seven hundred sixty-five million, three hundred thirty-eight thousand, nine hundred ninety-three".