1813417409 has 4 divisors (see below), whose sum is σ = 1815124416. Its totient is φ = 1811710404.

The previous prime is 1813417391. The next prime is 1813417439. The reversal of 1813417409 is 9047143181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9047143181 = 17 ⋅532184893.

It is a cyclic number.

It is not a de Polignac number, because 1813417409 - 2¹⁶ = 1813351873 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1813417439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 851909 + ... + 854034.

It is an arithmetic number, because the mean of its divisors is an integer number (453781104).

Almost surely, 2^1813417409 is an apocalyptic number.

It is an amenable number.

1813417409 is a deficient number, since it is larger than the sum of its proper divisors (1707007).

1813417409 is a wasteful number, since it uses less digits than its factorization.

1813417409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707006.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 1813417409 is about 42584.2389740618. The cubic root of 1813417409 is about 1219.4554160416.

The spelling of 1813417409 in words is "one billion, eight hundred thirteen million, four hundred seventeen thousand, four hundred nine".