1606634543 has 2 divisors, whose sum is σ = 1606634544. Its totient is φ = 1606634542.

The previous prime is 1606634503. The next prime is 1606634581. The reversal of 1606634543 is 3454366061.

It is an a-pointer prime, because the next prime (1606634581) can be obtained adding 1606634543 to its sum of digits (38).

It is a strong prime.

It is an emirp because it is prime and its reverse (3454366061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1606634543 - 2¹⁰ = 1606633519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1606634497 and 1606634506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1606634503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 803317271 + 803317272.

It is an arithmetic number, because the mean of its divisors is an integer number (803317272).

Almost surely, 2^1606634543 is an apocalyptic number.

1606634543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1606634543 is an equidigital number, since it uses as much as digits as its factorization.

1606634543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 38.

The square root of 1606634543 is about 40082.8459942654. The cubic root of 1606634543 is about 1171.2214927074.

The spelling of 1606634543 in words is "one billion, six hundred six million, six hundred thirty-four thousand, five hundred forty-three".