695201989 has 2 divisors, whose sum is σ = 695201990. Its totient is φ = 695201988.

The previous prime is 695201987. The next prime is 695202017. The reversal of 695201989 is 989102596.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 638320225 + 56881764 = 25265^2 + 7542^2 .

It is a cyclic number.

It is not a de Polignac number, because 695201989 - 2¹ = 695201987 is a prime.

It is a super-2 number, since 2×695201989² = 966611611019112242, which contains 22 as substring.

Together with 695201987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (695201981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347600994 + 347600995.

It is an arithmetic number, because the mean of its divisors is an integer number (347600995).

Almost surely, 2^695201989 is an apocalyptic number.

It is an amenable number.

695201989 is a deficient number, since it is larger than the sum of its proper divisors (1).

695201989 is an equidigital number, since it uses as much as digits as its factorization.

695201989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 49.

The square root of 695201989 is about 26366.6833143647. The cubic root of 695201989 is about 885.8706951208.

The spelling of 695201989 in words is "six hundred ninety-five million, two hundred one thousand, nine hundred eighty-nine".