1606424993 has 2 divisors, whose sum is σ = 1606424994. Its totient is φ = 1606424992.

The previous prime is 1606424983. The next prime is 1606425061. The reversal of 1606424993 is 3994246061.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1156476049 + 449948944 = 34007^2 + 21212^2 .

It is a cyclic number.

It is not a de Polignac number, because 1606424993 - 2⁸ = 1606424737 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1606424983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 803212496 + 803212497.

It is an arithmetic number, because the mean of its divisors is an integer number (803212497).

Almost surely, 2^1606424993 is an apocalyptic number.

It is an amenable number.

1606424993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1606424993 is an equidigital number, since it uses as much as digits as its factorization.

1606424993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 1606424993 is about 40080.2319479316. The cubic root of 1606424993 is about 1171.1705704995.

The spelling of 1606424993 in words is "one billion, six hundred six million, four hundred twenty-four thousand, nine hundred ninety-three".