2148943309 has 8 divisors (see below), whose sum is σ = 2165158688. Its totient is φ = 2132760240.

The previous prime is 2148943271. The next prime is 2148943351. The reversal of 2148943309 is 9033498412.

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 2148943309 - 2⁹ = 2148942797 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 (2148943369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134854 + ... + 149944.

It is an arithmetic number, because the mean of its divisors is an integer number (270644836).

Almost surely, 2^2148943309 is an apocalyptic number.

It is an amenable number.

2148943309 is a deficient number, since it is larger than the sum of its proper divisors (16215379).

2148943309 is a wasteful number, since it uses less digits than its factorization.

2148943309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16155.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 2148943309 is about 46356.6964849740. The cubic root of 2148943309 is about 1290.4513992252.

The spelling of 2148943309 in words is "two billion, one hundred forty-eight million, nine hundred forty-three thousand, three hundred nine".