695439869 has 2 divisors, whose sum is σ = 695439870. Its totient is φ = 695439868.

The previous prime is 695439853. The next prime is 695439889. The reversal of 695439869 is 968934596.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 625500100 + 69939769 = 25010^2 + 8363^2 .

It is a cyclic number.

It is not a de Polignac number, because 695439869 - 2⁴ = 695439853 is a prime.

It is a super-2 number, since 2×695439869² = 967273222789474322, 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 (695439889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347719934 + 347719935.

It is an arithmetic number, because the mean of its divisors is an integer number (347719935).

Almost surely, 2^695439869 is an apocalyptic number.

It is an amenable number.

695439869 is a deficient number, since it is larger than the sum of its proper divisors (1).

695439869 is an equidigital number, since it uses as much as digits as its factorization.

695439869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12597120, while the sum is 59.

The square root of 695439869 is about 26371.1939244320. The cubic root of 695439869 is about 885.9717242189.

The spelling of 695439869 in words is "six hundred ninety-five million, four hundred thirty-nine thousand, eight hundred sixty-nine".