1954445309 has 8 divisors (see below), whose sum is σ = 2044673280. Its totient is φ = 1864655056.

The previous prime is 1954445303. The next prime is 1954445327. The reversal of 1954445309 is 9035444591.

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 1954445309 - 2⁴ = 1954445293 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1954445309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1954445303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100277 + ... + 118170.

It is an arithmetic number, because the mean of its divisors is an integer number (255584160).

Almost surely, 2^1954445309 is an apocalyptic number.

It is an amenable number.

1954445309 is a deficient number, since it is larger than the sum of its proper divisors (90227971).

1954445309 is a wasteful number, since it uses less digits than its factorization.

1954445309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218859.

The product of its (nonzero) digits is 388800, while the sum is 44.

The square root of 1954445309 is about 44209.1088917205. The cubic root of 1954445309 is about 1250.2816024753.

The spelling of 1954445309 in words is "one billion, nine hundred fifty-four million, four hundred forty-five thousand, three hundred nine".