1633143049 has 2 divisors, whose sum is σ = 1633143050. Its totient is φ = 1633143048.

The previous prime is 1633143047. The next prime is 1633143073. The reversal of 1633143049 is 9403413361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1600000000 + 33143049 = 40000^2 + 5757^2 .

It is an emirp because it is prime and its reverse (9403413361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1633143049 - 2¹ = 1633143047 is a prime.

Together with 1633143047, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1633143047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 816571524 + 816571525.

It is an arithmetic number, because the mean of its divisors is an integer number (816571525).

Almost surely, 2^1633143049 is an apocalyptic number.

It is an amenable number.

1633143049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1633143049 is an equidigital number, since it uses as much as digits as its factorization.

1633143049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 1633143049 is about 40412.1646166102. The cubic root of 1633143049 is about 1177.6278710098.

It can be divided in two parts, 16 and 33143049, that multiplied together give a square (530288784 = 23028²).

The spelling of 1633143049 in words is "one billion, six hundred thirty-three million, one hundred forty-three thousand, forty-nine".