1983227857 has 8 divisors (see below), whose sum is σ = 2154686184. Its totient is φ = 1814469888.

The previous prime is 1983227747. The next prime is 1983227867. The reversal of 1983227857 is 7587223891.

It can be written as a sum of positive squares in 4 ways, for example, as 406264336 + 1576963521 = 20156^2 + 39711^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1983227857 - 2²³ = 1974839249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1983227867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 673558 + ... + 676495.

It is an arithmetic number, because the mean of its divisors is an integer number (269335773).

Almost surely, 2^1983227857 is an apocalyptic number.

It is an amenable number.

1983227857 is a deficient number, since it is larger than the sum of its proper divisors (171458327).

1983227857 is a wasteful number, since it uses less digits than its factorization.

1983227857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1350179.

The product of its digits is 1693440, while the sum is 52.

The square root of 1983227857 is about 44533.4464981097. The cubic root of 1983227857 is about 1256.3892293828.

The spelling of 1983227857 in words is "one billion, nine hundred eighty-three million, two hundred twenty-seven thousand, eight hundred fifty-seven".