780085469 has 2 divisors, whose sum is σ = 780085470. Its totient is φ = 780085468.

The previous prime is 780085417. The next prime is 780085483. The reversal of 780085469 is 964580087.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 590004100 + 190081369 = 24290^2 + 13787^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-780085469 is a prime.

It is a super-2 number, since 2×780085469² = 1217066677889899922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (780085499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390042734 + 390042735.

It is an arithmetic number, because the mean of its divisors is an integer number (390042735).

Almost surely, 2^780085469 is an apocalyptic number.

It is an amenable number.

780085469 is a deficient number, since it is larger than the sum of its proper divisors (1).

780085469 is an equidigital number, since it uses as much as digits as its factorization.

780085469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 780085469 is about 27930.0101861779. The cubic root of 780085469 is about 920.5500290821.

The spelling of 780085469 in words is "seven hundred eighty million, eighty-five thousand, four hundred sixty-nine".