1894340863 has 4 divisors (see below), whose sum is σ = 1894690728. Its totient is φ = 1893991000.

The previous prime is 1894340857. The next prime is 1894340867. The reversal of 1894340863 is 3680434981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3680434981 = 127 ⋅28979803.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1894340863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1894340867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166681 + ... + 177682.

It is an arithmetic number, because the mean of its divisors is an integer number (473672682).

Almost surely, 2^1894340863 is an apocalyptic number.

1894340863 is a deficient number, since it is larger than the sum of its proper divisors (349865).

1894340863 is an equidigital number, since it uses as much as digits as its factorization.

1894340863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349864.

The product of its (nonzero) digits is 497664, while the sum is 46.

The square root of 1894340863 is about 43524.0262728530. The cubic root of 1894340863 is about 1237.3314235969.

The spelling of 1894340863 in words is "one billion, eight hundred ninety-four million, three hundred forty thousand, eight hundred sixty-three".