1166789587 has 4 divisors (see below), whose sum is σ = 1182773080. Its totient is φ = 1150806096.

The previous prime is 1166789557. The next prime is 1166789629. The reversal of 1166789587 is 7859876611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1166789587 - 2¹⁹ = 1166265299 is a prime.

It is a super-2 number, since 2×1166789587² = 2722795880663261138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1166789537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7991637 + ... + 7991782.

It is an arithmetic number, because the mean of its divisors is an integer number (295693270).

Almost surely, 2^1166789587 is an apocalyptic number.

1166789587 is a deficient number, since it is larger than the sum of its proper divisors (15983493).

1166789587 is an equidigital number, since it uses as much as digits as its factorization.

1166789587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15983492.

The product of its digits is 5080320, while the sum is 58.

The square root of 1166789587 is about 34158.3018752396. The cubic root of 1166789587 is about 1052.7635701695.

The spelling of 1166789587 in words is "one billion, one hundred sixty-six million, seven hundred eighty-nine thousand, five hundred eighty-seven".