1669964141 has 4 divisors (see below), whose sum is σ = 1723833984. Its totient is φ = 1616094300.

The previous prime is 1669964129. The next prime is 1669964161. The reversal of 1669964141 is 1414699661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1414699661 = 10859 ⋅130279.

It is a cyclic number.

It is not a de Polignac number, because 1669964141 - 2¹⁰ = 1669963117 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 (1669964161) 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, 26934875 + ... + 26934936.

It is an arithmetic number, because the mean of its divisors is an integer number (430958496).

Almost surely, 2^1669964141 is an apocalyptic number.

It is an amenable number.

1669964141 is a deficient number, since it is larger than the sum of its proper divisors (53869843).

1669964141 is an equidigital number, since it uses as much as digits as its factorization.

1669964141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53869842.

The product of its digits is 279936, while the sum is 47.

The square root of 1669964141 is about 40865.1947383100. The cubic root of 1669964141 is about 1186.4125040173.

The spelling of 1669964141 in words is "one billion, six hundred sixty-nine million, nine hundred sixty-four thousand, one hundred forty-one".