1606390433 has 2 divisors, whose sum is σ = 1606390434. Its totient is φ = 1606390432.

The previous prime is 1606390381. The next prime is 1606390439. The reversal of 1606390433 is 3340936061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1448335249 + 158055184 = 38057^2 + 12572^2 .

It is a cyclic number.

It is not a de Polignac number, because 1606390433 - 2¹² = 1606386337 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1606390393 and 1606390402.

It is not a weakly prime, because it can be changed into another prime (1606390439) 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, 803195216 + 803195217.

It is an arithmetic number, because the mean of its divisors is an integer number (803195217).

Almost surely, 2^1606390433 is an apocalyptic number.

It is an amenable number.

1606390433 is a deficient number, since it is larger than the sum of its proper divisors (1).

1606390433 is an equidigital number, since it uses as much as digits as its factorization.

1606390433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 35.

The square root of 1606390433 is about 40079.8008103833. The cubic root of 1606390433 is about 1171.1621717371.

The spelling of 1606390433 in words is "one billion, six hundred six million, three hundred ninety thousand, four hundred thirty-three".