1609995413 has 4 divisors (see below), whose sum is σ = 1733841228. Its totient is φ = 1486149600.

The previous prime is 1609995403. The next prime is 1609995433. The reversal of 1609995413 is 3145999061.

It is a happy number.

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 616926244 + 993069169 = 24838^2 + 31513^2 .

It is not a de Polignac number, because 1609995413 - 2⁸ = 1609995157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1609995403) 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 in 3 ways as a sum of consecutive naturals, for example, 61922888 + ... + 61922913.

It is an arithmetic number, because the mean of its divisors is an integer number (433460307).

Almost surely, 2^1609995413 is an apocalyptic number.

1609995413 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1609995413 is a deficient number, since it is larger than the sum of its proper divisors (123845815).

1609995413 is a wasteful number, since it uses less digits than its factorization.

1609995413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123845814.

The product of its (nonzero) digits is 262440, while the sum is 47.

The square root of 1609995413 is about 40124.7481362812. The cubic root of 1609995413 is about 1172.0376047935.

The spelling of 1609995413 in words is "one billion, six hundred nine million, nine hundred ninety-five thousand, four hundred thirteen".