1147536891 has 12 divisors (see below), whose sum is σ = 1666144168. Its totient is φ = 761059584.

The previous prime is 1147536847. The next prime is 1147536893. The reversal of 1147536891 is 1986357411.

It is not a de Polignac number, because 1147536891 - 2¹³ = 1147528699 is a prime.

It is a super-3 number, since 3×1147536891³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1147536893) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 328585 + ... + 332058.

Almost surely, 2^1147536891 is an apocalyptic number.

1147536891 is a deficient number, since it is larger than the sum of its proper divisors (518607277).

1147536891 is a wasteful number, since it uses less digits than its factorization.

1147536891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660842 (or 660839 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 1147536891 is about 33875.3138878446. The cubic root of 1147536891 is about 1046.9410261717.

The spelling of 1147536891 in words is "one billion, one hundred forty-seven million, five hundred thirty-six thousand, eight hundred ninety-one".