1983902171 has 2 divisors, whose sum is σ = 1983902172. Its totient is φ = 1983902170.

The previous prime is 1983902161. The next prime is 1983902197. The reversal of 1983902171 is 1712093891.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1983902171 - 2²² = 1979707867 is a prime.

It is not a weakly prime, because it can be changed into another prime (1983902111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 991951085 + 991951086.

It is an arithmetic number, because the mean of its divisors is an integer number (991951086).

Almost surely, 2^1983902171 is an apocalyptic number.

1983902171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1983902171 is an equidigital number, since it uses as much as digits as its factorization.

1983902171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 1983902171 is about 44541.0167261593. The cubic root of 1983902171 is about 1256.5316075171.

The spelling of 1983902171 in words is "one billion, nine hundred eighty-three million, nine hundred two thousand, one hundred seventy-one".