705431669 has 2 divisors, whose sum is σ = 705431670. Its totient is φ = 705431668.

The previous prime is 705431663. The next prime is 705431687. The reversal of 705431669 is 966134507.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 680531569 + 24900100 = 26087^2 + 4990^2 .

It is a cyclic number.

It is not a de Polignac number, because 705431669 - 2¹⁶ = 705366133 is a prime.

It is a super-2 number, since 2×705431669² = 995267679256251122, which contains 22 as substring.

It is equal to p_36519566 and since 705431669 and 36519566 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (705431663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 352715834 + 352715835.

It is an arithmetic number, because the mean of its divisors is an integer number (352715835).

Almost surely, 2^705431669 is an apocalyptic number.

It is an amenable number.

705431669 is a deficient number, since it is larger than the sum of its proper divisors (1).

705431669 is an equidigital number, since it uses as much as digits as its factorization.

705431669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 705431669 is about 26559.9636483185. The cubic root of 705431669 is about 890.1946588481.

The spelling of 705431669 in words is "seven hundred five million, four hundred thirty-one thousand, six hundred sixty-nine".