1638437483 has 2 divisors, whose sum is σ = 1638437484. Its totient is φ = 1638437482.

The previous prime is 1638437461. The next prime is 1638437527. The reversal of 1638437483 is 3847348361.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1638437483 - 2¹⁸ = 1638175339 is a prime.

It is not a weakly prime, because it can be changed into another prime (1638437443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 819218741 + 819218742.

It is an arithmetic number, because the mean of its divisors is an integer number (819218742).

Almost surely, 2^1638437483 is an apocalyptic number.

1638437483 is a deficient number, since it is larger than the sum of its proper divisors (1).

1638437483 is an equidigital number, since it uses as much as digits as its factorization.

1638437483 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 47.

The square root of 1638437483 is about 40477.6170617787. The cubic root of 1638437483 is about 1178.8990696365.

The spelling of 1638437483 in words is "one billion, six hundred thirty-eight million, four hundred thirty-seven thousand, four hundred eighty-three".