2909221394 has 8 divisors (see below), whose sum is σ = 4435370508. Its totient is φ = 1430764560.

The previous prime is 2909221361. The next prime is 2909221411. The reversal of 2909221394 is 4931229092.

It can be written as a sum of positive squares in 2 ways, for example, as 2908984225 + 237169 = 53935^2 + 487^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11922917 + ... + 11923160.

Almost surely, 2^2909221394 is an apocalyptic number.

2909221394 is a deficient number, since it is larger than the sum of its proper divisors (1526149114).

2909221394 is a wasteful number, since it uses less digits than its factorization.

2909221394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23846140.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 2909221394 is about 53937.1986109772. The cubic root of 2909221394 is about 1427.5530542798.

The spelling of 2909221394 in words is "two billion, nine hundred nine million, two hundred twenty-one thousand, three hundred ninety-four".