1131099999 has 8 divisors (see below), whose sum is σ = 1508803632. Its totient is φ = 753731520.

The previous prime is 1131099997. The next prime is 1131100031. The reversal of 1131099999 is 9999901311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1131099999 - 2¹ = 1131099997 is a prime.

1131099999 is a modest number, since divided by 99999 gives 11310 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131099997) 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 in 7 ways as a sum of consecutive naturals, for example, 75804 + ... + 89489.

It is an arithmetic number, because the mean of its divisors is an integer number (188600454).

Almost surely, 2^1131099999 is an apocalyptic number.

1131099999 is a deficient number, since it is larger than the sum of its proper divisors (377703633).

1131099999 is a wasteful number, since it uses less digits than its factorization.

1131099999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167577.

The product of its (nonzero) digits is 177147, while the sum is 51.

The square root of 1131099999 is about 33631.8301464550. The cubic root of 1131099999 is about 1041.9183033442.

The spelling of 1131099999 in words is "one billion, one hundred thirty-one million, ninety-nine thousand, nine hundred ninety-nine".