1161324999 has 8 divisors (see below), whose sum is σ = 1720481520. Its totient is φ = 774216648.

The previous prime is 1161324991. The next prime is 1161325013. The reversal of 1161324999 is 9994231611.

1161324999 is a `hidden beast` number, since 1 + 1 + 613 + 24 + 9 + 9 + 9 = 666.

It is not a de Polignac number, because 1161324999 - 2³ = 1161324991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161324991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21505992 + ... + 21506045.

It is an arithmetic number, because the mean of its divisors is an integer number (215060190).

Almost surely, 2^1161324999 is an apocalyptic number.

1161324999 is a deficient number, since it is larger than the sum of its proper divisors (559156521).

1161324999 is an equidigital number, since it uses as much as digits as its factorization.

1161324999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43012046 (or 43012040 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 1161324999 is about 34078.2188354967. The cubic root of 1161324999 is about 1051.1174796698.

The spelling of 1161324999 in words is "one billion, one hundred sixty-one million, three hundred twenty-four thousand, nine hundred ninety-nine".