2149903394 has 4 divisors (see below), whose sum is σ = 3224855094. Its totient is φ = 1074951696.

The previous prime is 2149903387. The next prime is 2149903397. The reversal of 2149903394 is 4933099412.

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

It can be written as a sum of positive squares in only one way, i.e., 1250683225 + 899220169 = 35365^2 + 29987^2 .

It is not an unprimeable number, because it can be changed into a prime (2149903397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 537475847 + ... + 537475850.

Almost surely, 2^2149903394 is an apocalyptic number.

2149903394 is a deficient number, since it is larger than the sum of its proper divisors (1074951700).

2149903394 is a wasteful number, since it uses less digits than its factorization.

2149903394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074951699.

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 2149903394 is about 46367.0507364874. The cubic root of 2149903394 is about 1290.6435492561.

The spelling of 2149903394 in words is "two billion, one hundred forty-nine million, nine hundred three thousand, three hundred ninety-four".