1986117241 has 2 divisors, whose sum is σ = 1986117242. Its totient is φ = 1986117240.

The previous prime is 1986117187. The next prime is 1986117257. The reversal of 1986117241 is 1427116891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1971715216 + 14402025 = 44404^2 + 3795^2 .

It is a cyclic number.

It is not a de Polignac number, because 1986117241 - 2¹³ = 1986109049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1986117194 and 1986117203.

It is not a weakly prime, because it can be changed into another prime (1986117271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 993058620 + 993058621.

It is an arithmetic number, because the mean of its divisors is an integer number (993058621).

Almost surely, 2^1986117241 is an apocalyptic number.

It is an amenable number.

1986117241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1986117241 is an equidigital number, since it uses as much as digits as its factorization.

1986117241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 40.

The square root of 1986117241 is about 44565.8752971374. The cubic root of 1986117241 is about 1256.9990818843. Note that the first 3 decimals are identical.

The spelling of 1986117241 in words is "one billion, nine hundred eighty-six million, one hundred seventeen thousand, two hundred forty-one".