1983854399 has 4 divisors (see below), whose sum is σ = 2008966560. Its totient is φ = 1958742240.

The previous prime is 1983854387. The next prime is 1983854449. The reversal of 1983854399 is 9934583891.

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

It is a cyclic number.

It is not a de Polignac number, because 1983854399 - 2⁸ = 1983854143 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 (1983854339) 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, 12555962 + ... + 12556119.

It is an arithmetic number, because the mean of its divisors is an integer number (502241640).

Almost surely, 2^1983854399 is an apocalyptic number.

1983854399 is a deficient number, since it is larger than the sum of its proper divisors (25112161).

1983854399 is an equidigital number, since it uses as much as digits as its factorization.

1983854399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25112160.

The product of its digits is 8398080, while the sum is 59.

The square root of 1983854399 is about 44540.4804531788. The cubic root of 1983854399 is about 1256.5215217527.

The spelling of 1983854399 in words is "one billion, nine hundred eighty-three million, eight hundred fifty-four thousand, three hundred ninety-nine".