1161057889 has 4 divisors (see below), whose sum is σ = 1161151024. Its totient is φ = 1160964756.

The previous prime is 1161057883. The next prime is 1161057907. The reversal of 1161057889 is 9887501611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1161057889 - 2³ = 1161057881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161057881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24327 + ... + 53980.

It is an arithmetic number, because the mean of its divisors is an integer number (290287756).

Almost surely, 2^1161057889 is an apocalyptic number.

It is an amenable number.

1161057889 is a deficient number, since it is larger than the sum of its proper divisors (93135).

1161057889 is an equidigital number, since it uses as much as digits as its factorization.

1161057889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93134.

The product of its (nonzero) digits is 120960, while the sum is 46.

The square root of 1161057889 is about 34074.2995379215. The cubic root of 1161057889 is about 1051.0368862331.

The spelling of 1161057889 in words is "one billion, one hundred sixty-one million, fifty-seven thousand, eight hundred eighty-nine".