1983886057 has 4 divisors (see below), whose sum is σ = 1991605716. Its totient is φ = 1976166400.

The previous prime is 1983886049. The next prime is 1983886061. The reversal of 1983886057 is 7506883891.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1962578601 + 21307456 = 44301^2 + 4616^2 .

It is a cyclic number.

It is not a de Polignac number, because 1983886057 - 2³ = 1983886049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1983885989 and 1983886007.

It is not an unprimeable number, because it can be changed into a prime (1983886067) 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, 3859444 + ... + 3859957.

It is an arithmetic number, because the mean of its divisors is an integer number (497901429).

Almost surely, 2^1983886057 is an apocalyptic number.

It is an amenable number.

1983886057 is a deficient number, since it is larger than the sum of its proper divisors (7719659).

1983886057 is an equidigital number, since it uses as much as digits as its factorization.

1983886057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7719658.

The product of its (nonzero) digits is 2903040, while the sum is 55.

The square root of 1983886057 is about 44540.8358363424. The cubic root of 1983886057 is about 1256.5282055004.

The spelling of 1983886057 in words is "one billion, nine hundred eighty-three million, eight hundred eighty-six thousand, fifty-seven".