776425469 has 2 divisors, whose sum is σ = 776425470. Its totient is φ = 776425468.

The previous prime is 776425459. The next prime is 776425471. The reversal of 776425469 is 964524677.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 458516569 + 317908900 = 21413^2 + 17830^2 .

It is a cyclic number.

It is not a de Polignac number, because 776425469 - 2⁴ = 776425453 is a prime.

It is a super-2 number, since 2×776425469² = 1205673017823739922, which contains 22 as substring.

Together with 776425471, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (776425459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 388212734 + 388212735.

It is an arithmetic number, because the mean of its divisors is an integer number (388212735).

Almost surely, 2^776425469 is an apocalyptic number.

It is an amenable number.

776425469 is a deficient number, since it is larger than the sum of its proper divisors (1).

776425469 is an equidigital number, since it uses as much as digits as its factorization.

776425469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2540160, while the sum is 50.

The square root of 776425469 is about 27864.4122313750. The cubic root of 776425469 is about 919.1080947319.

It can be divided in two parts, 7764 and 25469, that added together give a palindrome (33233).

The spelling of 776425469 in words is "seven hundred seventy-six million, four hundred twenty-five thousand, four hundred sixty-nine".