1133577891 has 12 divisors (see below), whose sum is σ = 1661829832. Its totient is φ = 744438816.

The previous prime is 1133577871. The next prime is 1133577941. The reversal of 1133577891 is 1987753311.

It is not a de Polignac number, because 1133577891 - 2⁵ = 1133577859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1133577811) 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, 939346 + ... + 940551.

Almost surely, 2^1133577891 is an apocalyptic number.

1133577891 is a deficient number, since it is larger than the sum of its proper divisors (528251941).

1133577891 is a wasteful number, since it uses less digits than its factorization.

1133577891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1879970 (or 1879967 counting only the distinct ones).

The product of its digits is 158760, while the sum is 45.

The square root of 1133577891 is about 33668.6484878737. The cubic root of 1133577891 is about 1042.6785892136.

The spelling of 1133577891 in words is "one billion, one hundred thirty-three million, five hundred seventy-seven thousand, eight hundred ninety-one".