1149115899 has 4 divisors (see below), whose sum is σ = 1532154536. Its totient is φ = 766077264.

The previous prime is 1149115873. The next prime is 1149115921. The reversal of 1149115899 is 9985119411.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-1149115899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1149115199) 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 3 ways as a sum of consecutive naturals, for example, 191519314 + ... + 191519319.

It is an arithmetic number, because the mean of its divisors is an integer number (383038634).

Almost surely, 2^1149115899 is an apocalyptic number.

1149115899 is a deficient number, since it is larger than the sum of its proper divisors (383038637).

1149115899 is an equidigital number, since it uses as much as digits as its factorization.

1149115899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383038636.

The product of its digits is 116640, while the sum is 48.

The square root of 1149115899 is about 33898.6120512330. The cubic root of 1149115899 is about 1047.4210022011.

The spelling of 1149115899 in words is "one billion, one hundred forty-nine million, one hundred fifteen thousand, eight hundred ninety-nine".