1606020403 has 4 divisors (see below), whose sum is σ = 1729560448. Its totient is φ = 1482480360.

The previous prime is 1606020401. The next prime is 1606020407. The reversal of 1606020403 is 3040206061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3040206061 = 229 ⋅13276009.

It is a cyclic number.

It is not a de Polignac number, because 1606020403 - 2¹ = 1606020401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1606020401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61770003 + ... + 61770028.

It is an arithmetic number, because the mean of its divisors is an integer number (432390112).

Almost surely, 2^1606020403 is an apocalyptic number.

1606020403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1606020403 is a deficient number, since it is larger than the sum of its proper divisors (123540045).

1606020403 is a wasteful number, since it uses less digits than its factorization.

1606020403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123540044.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1606020403 is about 40075.1843788647. The cubic root of 1606020403 is about 1171.0722395910.

Adding to 1606020403 its reverse (3040206061), we get a palindrome (4646226464).

It can be divided in two parts, 16060 and 20403, that added together give a palindrome (36463).

The spelling of 1606020403 in words is "one billion, six hundred six million, twenty thousand, four hundred three".