1986966129 has 4 divisors (see below), whose sum is σ = 2649288176. Its totient is φ = 1324644084.

The previous prime is 1986966127. The next prime is 1986966143. The reversal of 1986966129 is 9216696891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1986966129 - 2¹ = 1986966127 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1986966127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 331161019 + ... + 331161024.

It is an arithmetic number, because the mean of its divisors is an integer number (662322044).

Almost surely, 2^1986966129 is an apocalyptic number.

It is an amenable number.

1986966129 is a deficient number, since it is larger than the sum of its proper divisors (662322047).

1986966129 is an equidigital number, since it uses as much as digits as its factorization.

1986966129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662322046.

The product of its digits is 2519424, while the sum is 57.

The square root of 1986966129 is about 44575.3982483612. The cubic root of 1986966129 is about 1257.1781413792.

The spelling of 1986966129 in words is "one billion, nine hundred eighty-six million, nine hundred sixty-six thousand, one hundred twenty-nine".