1149147891 has 10 divisors (see below), whose sum is σ = 1716628452. Its totient is φ = 766098540.

The previous prime is 1149147847. The next prime is 1149147893. The reversal of 1149147891 is 1987419411.

1149147891 is a `hidden beast` number, since 1 + 1 + 4 + 91 + 478 + 91 = 666.

It is not a de Polignac number, because 1149147891 - 2¹³ = 1149139699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1149147893) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 7093425 + ... + 7093586.

Almost surely, 2^1149147891 is an apocalyptic number.

1149147891 is a deficient number, since it is larger than the sum of its proper divisors (567480561).

1149147891 is an equidigital number, since it uses as much as digits as its factorization.

1149147891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14187023 (or 14187014 counting only the distinct ones).

The product of its digits is 72576, while the sum is 45.

The square root of 1149147891 is about 33899.0839256756. The cubic root of 1149147891 is about 1047.4307223642.

The spelling of 1149147891 in words is "one billion, one hundred forty-nine million, one hundred forty-seven thousand, eight hundred ninety-one".