695444989 has 2 divisors, whose sum is σ = 695444990. Its totient is φ = 695444988.

The previous prime is 695444941. The next prime is 695444999. The reversal of 695444989 is 989444596.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 679905625 + 15539364 = 26075^2 + 3942^2 .

It is a cyclic number.

It is not a de Polignac number, because 695444989 - 2²⁵ = 661890557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (695444999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347722494 + 347722495.

It is an arithmetic number, because the mean of its divisors is an integer number (347722495).

Almost surely, 2^695444989 is an apocalyptic number.

It is an amenable number.

695444989 is a deficient number, since it is larger than the sum of its proper divisors (1).

695444989 is an equidigital number, since it uses as much as digits as its factorization.

695444989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11197440, while the sum is 58.

The square root of 695444989 is about 26371.2909998733. The cubic root of 695444989 is about 885.9738984611.

The spelling of 695444989 in words is "six hundred ninety-five million, four hundred forty-four thousand, nine hundred eighty-nine".