1986350121 has 20 divisors (see below), whose sum is σ = 3391159552. Its totient is φ = 1135056888.

The previous prime is 1986350101. The next prime is 1986350129. The reversal of 1986350121 is 1210536891.

1986350121 is a `hidden beast` number, since 1 + 9 + 8 + 635 + 0 + 12 + 1 = 666.

It is not a de Polignac number, because 1986350121 - 2⁷ = 1986349993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1986350129) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1751065 + ... + 1752198.

Almost surely, 2^1986350121 is an apocalyptic number.

It is an amenable number.

1986350121 is a deficient number, since it is larger than the sum of its proper divisors (1404809431).

1986350121 is an equidigital number, since it uses as much as digits as its factorization.

1986350121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3503282 (or 3503273 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 1986350121 is about 44568.4879819812. The cubic root of 1986350121 is about 1257.0482093141.

The spelling of 1986350121 in words is "one billion, nine hundred eighty-six million, three hundred fifty thousand, one hundred twenty-one".