1909114519 has 4 divisors (see below), whose sum is σ = 2055969496. Its totient is φ = 1762259544.

The previous prime is 1909114481. The next prime is 1909114523. The reversal of 1909114519 is 9154119091.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1909114519 is a prime.

It is a super-2 number, since 2×1909114519² = 7289436493313202722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1909115519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73427469 + ... + 73427494.

It is an arithmetic number, because the mean of its divisors is an integer number (513992374).

Almost surely, 2^1909114519 is an apocalyptic number.

1909114519 is a deficient number, since it is larger than the sum of its proper divisors (146854977).

1909114519 is a wasteful number, since it uses less digits than its factorization.

1909114519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146854976.

The product of its (nonzero) digits is 14580, while the sum is 40.

The square root of 1909114519 is about 43693.4150530718. The cubic root of 1909114519 is about 1240.5396798856.

The spelling of 1909114519 in words is "one billion, nine hundred nine million, one hundred fourteen thousand, five hundred nineteen".