1983986893 has 16 divisors (see below), whose sum is σ = 2288366080. Its totient is φ = 1684897200.

The previous prime is 1983986891. The next prime is 1983986909. The reversal of 1983986893 is 3986893891.

It is a happy number.

It is not a de Polignac number, because 1983986893 - 2¹ = 1983986891 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1983986891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 553798 + ... + 557368.

It is an arithmetic number, because the mean of its divisors is an integer number (143022880).

Almost surely, 2^1983986893 is an apocalyptic number.

It is an amenable number.

1983986893 is a deficient number, since it is larger than the sum of its proper divisors (304379187).

1983986893 is a wasteful number, since it uses less digits than its factorization.

1983986893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4288.

The product of its digits is 20155392, while the sum is 64.

The square root of 1983986893 is about 44541.9677719788. The cubic root of 1983986893 is about 1256.5494938754.

The spelling of 1983986893 in words is "one billion, nine hundred eighty-three million, nine hundred eighty-six thousand, eight hundred ninety-three".