199355589469 has 2 divisors, whose sum is σ = 199355589470. Its totient is φ = 199355589468.

The previous prime is 199355589463. The next prime is 199355589497. The reversal of 199355589469 is 964985553991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198777764025 + 577825444 = 445845^2 + 24038^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199355589469 is a prime.

It is a super-2 number, since 2×199355589469² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199355589463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99677794734 + 99677794735.

It is an arithmetic number, because the mean of its divisors is an integer number (99677794735).

Almost surely, 2^199355589469 is an apocalyptic number.

It is an amenable number.

199355589469 is a deficient number, since it is larger than the sum of its proper divisors (1).

199355589469 is an equidigital number, since it uses as much as digits as its factorization.

199355589469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 472392000, while the sum is 73.

The spelling of 199355589469 in words is "one hundred ninety-nine billion, three hundred fifty-five million, five hundred eighty-nine thousand, four hundred sixty-nine".