1606213623 has 32 divisors (see below), whose sum is σ = 2517314560. Its totient is φ = 891751680.

The previous prime is 1606213589. The next prime is 1606213627. The reversal of 1606213623 is 3263126061.

It is not a de Polignac number, because 1606213623 - 2¹⁰ = 1606212599 is a prime.

It is a super-2 number, since 2×1606213623² = 5159844405421572258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1606213627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 876318 + ... + 878148.

It is an arithmetic number, because the mean of its divisors is an integer number (78666080).

Almost surely, 2^1606213623 is an apocalyptic number.

1606213623 is a deficient number, since it is larger than the sum of its proper divisors (911100937).

1606213623 is a wasteful number, since it uses less digits than its factorization.

1606213623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3007.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 1606213623 is about 40077.5950251509. The cubic root of 1606213623 is about 1171.1192015316.

Adding to 1606213623 its reverse (3263126061), we get a palindrome (4869339684).

The spelling of 1606213623 in words is "one billion, six hundred six million, two hundred thirteen thousand, six hundred twenty-three".