2163490939 has 4 divisors (see below), whose sum is σ = 2163621960. Its totient is φ = 2163359920.

The previous prime is 2163490933. The next prime is 2163490957. The reversal of 2163490939 is 9390943612.

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

It is a cyclic number.

It is not a de Polignac number, because 2163490939 - 2⁷ = 2163490811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2163490933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36442 + ... + 75199.

It is an arithmetic number, because the mean of its divisors is an integer number (540905490).

Almost surely, 2^2163490939 is an apocalyptic number.

2163490939 is a deficient number, since it is larger than the sum of its proper divisors (131021).

2163490939 is a wasteful number, since it uses less digits than its factorization.

2163490939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131020.

The product of its (nonzero) digits is 314928, while the sum is 46.

The square root of 2163490939 is about 46513.3415161715. The cubic root of 2163490939 is about 1293.3568280899.

The spelling of 2163490939 in words is "two billion, one hundred sixty-three million, four hundred ninety thousand, nine hundred thirty-nine".