1149603811 has 4 divisors (see below), whose sum is σ = 1150757872. Its totient is φ = 1148449752.

The previous prime is 1149603803. The next prime is 1149603821. The reversal of 1149603811 is 1183069411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1183069411 = 4513 ⋅262147.

It is a cyclic number.

It is not a de Polignac number, because 1149603811 - 2³ = 1149603803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1149603821) 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, 575535 + ... + 577528.

It is an arithmetic number, because the mean of its divisors is an integer number (287689468).

Almost surely, 2^1149603811 is an apocalyptic number.

1149603811 is a deficient number, since it is larger than the sum of its proper divisors (1154061).

1149603811 is an equidigital number, since it uses as much as digits as its factorization.

1149603811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154060.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 1149603811 is about 33905.8079243070. The cubic root of 1149603811 is about 1047.5692254173.

The spelling of 1149603811 in words is "one billion, one hundred forty-nine million, six hundred three thousand, eight hundred eleven".