695145221 has 2 divisors, whose sum is σ = 695145222. Its totient is φ = 695145220.

The previous prime is 695145149. The next prime is 695145239. The reversal of 695145221 is 122541596.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 492396100 + 202749121 = 22190^2 + 14239^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-695145221 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (695145421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347572610 + 347572611.

It is an arithmetic number, because the mean of its divisors is an integer number (347572611).

Almost surely, 2^695145221 is an apocalyptic number.

It is an amenable number.

695145221 is a deficient number, since it is larger than the sum of its proper divisors (1).

695145221 is an equidigital number, since it uses as much as digits as its factorization.

695145221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 35.

The square root of 695145221 is about 26365.6067823215. The cubic root of 695145221 is about 885.8465819962.

The spelling of 695145221 in words is "six hundred ninety-five million, one hundred forty-five thousand, two hundred twenty-one".