1909389214 has 4 divisors (see below), whose sum is σ = 2864083824. Its totient is φ = 954694606.

The previous prime is 1909389199. The next prime is 1909389217. The reversal of 1909389214 is 4129839091.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1909389217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 477347302 + ... + 477347305.

It is an arithmetic number, because the mean of its divisors is an integer number (716020956).

Almost surely, 2^1909389214 is an apocalyptic number.

1909389214 is a deficient number, since it is larger than the sum of its proper divisors (954694610).

1909389214 is an equidigital number, since it uses as much as digits as its factorization.

1909389214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954694609.

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 1909389214 is about 43696.5583770621. The cubic root of 1909389214 is about 1240.5991758284.

The spelling of 1909389214 in words is "one billion, nine hundred nine million, three hundred eighty-nine thousand, two hundred fourteen".