1086631999 has 4 divisors (see below), whose sum is σ = 1086861760. Its totient is φ = 1086402240.

The previous prime is 1086631981. The next prime is 1086632039. The reversal of 1086631999 is 9991366801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9991366801 = 13 ⋅768566677.

It is a cyclic number.

It is not a de Polignac number, because 1086631999 - 2⁵ = 1086631967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1086637999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107634 + ... + 117295.

It is an arithmetic number, because the mean of its divisors is an integer number (271715440).

Almost surely, 2^1086631999 is an apocalyptic number.

1086631999 is a deficient number, since it is larger than the sum of its proper divisors (229761).

1086631999 is an equidigital number, since it uses as much as digits as its factorization.

1086631999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229760.

The product of its (nonzero) digits is 629856, while the sum is 52.

The square root of 1086631999 is about 32964.1016713637. The cubic root of 1086631999 is about 1028.0813873574.

The spelling of 1086631999 in words is "one billion, eighty-six million, six hundred thirty-one thousand, nine hundred ninety-nine".