1641213113 has 8 divisors (see below), whose sum is σ = 1677771336. Its totient is φ = 1604966400.

The previous prime is 1641213073. The next prime is 1641213151. The reversal of 1641213113 is 3113121461.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 145998889 + 1495214224 = 12083^2 + 38668^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1641213113 - 2¹⁴ = 1641196729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1641213193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67208 + ... + 88313.

It is an arithmetic number, because the mean of its divisors is an integer number (209721417).

Almost surely, 2^1641213113 is an apocalyptic number.

It is an amenable number.

1641213113 is a deficient number, since it is larger than the sum of its proper divisors (36558223).

1641213113 is a wasteful number, since it uses less digits than its factorization.

1641213113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155755.

The product of its digits is 432, while the sum is 23.

The square root of 1641213113 is about 40511.8885390449. Note that the first 3 decimals coincide. The cubic root of 1641213113 is about 1179.5644071146.

Adding to 1641213113 its reverse (3113121461), we get a palindrome (4754334574).

The spelling of 1641213113 in words is "one billion, six hundred forty-one million, two hundred thirteen thousand, one hundred thirteen".