769943813 has 2 divisors, whose sum is σ = 769943814. Its totient is φ = 769943812.

The previous prime is 769943789. The next prime is 769943831. The reversal of 769943813 is 318349967.

Together with next prime (769943831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 639938209 + 130005604 = 25297^2 + 11402^2 .

It is a cyclic number.

It is not a de Polignac number, because 769943813 - 2⁶ = 769943749 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (769943843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384971906 + 384971907.

It is an arithmetic number, because the mean of its divisors is an integer number (384971907).

Almost surely, 2^769943813 is an apocalyptic number.

It is an amenable number.

769943813 is a deficient number, since it is larger than the sum of its proper divisors (1).

769943813 is an equidigital number, since it uses as much as digits as its factorization.

769943813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 50.

The square root of 769943813 is about 27747.8614130891. The cubic root of 769943813 is about 916.5433509193.

The spelling of 769943813 in words is "seven hundred sixty-nine million, nine hundred forty-three thousand, eight hundred thirteen".