1995563629 has 2 divisors, whose sum is σ = 1995563630. Its totient is φ = 1995563628.

The previous prime is 1995563611. The next prime is 1995563639. The reversal of 1995563629 is 9263655991.

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., 1836122500 + 159441129 = 42850^2 + 12627^2 .

It is an emirp because it is prime and its reverse (9263655991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1995563629 - 2¹³ = 1995555437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1995563629.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1995563639) 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, 997781814 + 997781815.

It is an arithmetic number, because the mean of its divisors is an integer number (997781815).

Almost surely, 2^1995563629 is an apocalyptic number.

It is an amenable number.

1995563629 is a deficient number, since it is larger than the sum of its proper divisors (1).

1995563629 is an equidigital number, since it uses as much as digits as its factorization.

1995563629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3936600, while the sum is 55.

The square root of 1995563629 is about 44671.7318782247. The cubic root of 1995563629 is about 1258.9887807047.

The spelling of 1995563629 in words is "one billion, nine hundred ninety-five million, five hundred sixty-three thousand, six hundred twenty-nine".