2163739421 has 8 divisors (see below), whose sum is σ = 2258335104. Its totient is φ = 2069187120.

The previous prime is 2163739381. The next prime is 2163739433. The reversal of 2163739421 is 1249373612.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2163739421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2163739471) 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 7 ways as a sum of consecutive naturals, for example, 130331 + ... + 145991.

It is an arithmetic number, because the mean of its divisors is an integer number (282291888).

Almost surely, 2^2163739421 is an apocalyptic number.

It is an amenable number.

2163739421 is a deficient number, since it is larger than the sum of its proper divisors (94595683).

2163739421 is a wasteful number, since it uses less digits than its factorization.

2163739421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21691.

The product of its digits is 54432, while the sum is 38.

The square root of 2163739421 is about 46516.0125225712. The cubic root of 2163739421 is about 1293.4063412144.

The spelling of 2163739421 in words is "two billion, one hundred sixty-three million, seven hundred thirty-nine thousand, four hundred twenty-one".