785435684669 has 2 divisors, whose sum is σ = 785435684670. Its totient is φ = 785435684668.

The previous prime is 785435684641. The next prime is 785435684707. The reversal of 785435684669 is 966486534587.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 528805296100 + 256630388569 = 727190^2 + 506587^2 .

It is a cyclic number.

It is not a de Polignac number, because 785435684669 - 2³² = 781140717373 is a prime.

It is a super-2 number, since 2×785435684669² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (785435687669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 392717842334 + 392717842335.

It is an arithmetic number, because the mean of its divisors is an integer number (392717842335).

Almost surely, 2^785435684669 is an apocalyptic number.

It is an amenable number.

785435684669 is a deficient number, since it is larger than the sum of its proper divisors (1).

785435684669 is an equidigital number, since it uses as much as digits as its factorization.

785435684669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1045094400, while the sum is 71.

The spelling of 785435684669 in words is "seven hundred eighty-five billion, four hundred thirty-five million, six hundred eighty-four thousand, six hundred sixty-nine".