814320769 has 2 divisors, whose sum is σ = 814320770. Its totient is φ = 814320768.

The previous prime is 814320763. The next prime is 814320809. The reversal of 814320769 is 967023418.

It is an a-pointer prime, because the next prime (814320809) can be obtained adding 814320769 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 798797169 + 15523600 = 28263^2 + 3940^2 .

It is a cyclic number.

It is not a de Polignac number, because 814320769 - 2⁵ = 814320737 is a prime.

It is a super-2 number, since 2×814320769² = 1326236629649502722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (814320763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407160384 + 407160385.

It is an arithmetic number, because the mean of its divisors is an integer number (407160385).

Almost surely, 2^814320769 is an apocalyptic number.

It is an amenable number.

814320769 is a deficient number, since it is larger than the sum of its proper divisors (1).

814320769 is an equidigital number, since it uses as much as digits as its factorization.

814320769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 814320769 is about 28536.3061554925. The cubic root of 814320769 is about 933.8242989885.

The spelling of 814320769 in words is "eight hundred fourteen million, three hundred twenty thousand, seven hundred sixty-nine".