1606423205 has 4 divisors (see below), whose sum is σ = 1927707852. Its totient is φ = 1285138560.

The previous prime is 1606423171. The next prime is 1606423213. The reversal of 1606423205 is 5023246061.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1063672996 + 542750209 = 32614^2 + 23297^2 .

It is not a de Polignac number, because 1606423205 - 2¹² = 1606419109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160642316 + ... + 160642325.

It is an arithmetic number, because the mean of its divisors is an integer number (481926963).

Almost surely, 2^1606423205 is an apocalyptic number.

It is an amenable number.

1606423205 is a deficient number, since it is larger than the sum of its proper divisors (321284647).

1606423205 is an equidigital number, since it uses as much as digits as its factorization.

1606423205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321284646.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 1606423205 is about 40080.2096426653. The cubic root of 1606423205 is about 1171.1701359831.

Adding to 1606423205 its reverse (5023246061), we get a palindrome (6629669266).

The spelling of 1606423205 in words is "one billion, six hundred six million, four hundred twenty-three thousand, two hundred five".