1986345099 has 10 divisors (see below), whose sum is σ = 2967256380. Its totient is φ = 1324230012.

The previous prime is 1986345089. The next prime is 1986345103. The reversal of 1986345099 is 9905436891.

It is not a de Polignac number, because 1986345099 - 2⁹ = 1986344587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1986345029) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 12261309 + ... + 12261470.

It is an arithmetic number, because the mean of its divisors is an integer number (296725638).

Almost surely, 2^1986345099 is an apocalyptic number.

1986345099 is a deficient number, since it is larger than the sum of its proper divisors (980911281).

1986345099 is an equidigital number, since it uses as much as digits as its factorization.

1986345099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24522791 (or 24522782 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 54.

The square root of 1986345099 is about 44568.4316416901. The cubic root of 1986345099 is about 1257.0471499336.

The spelling of 1986345099 in words is "one billion, nine hundred eighty-six million, three hundred forty-five thousand, ninety-nine".