1164231491 has 4 divisors (see below), whose sum is σ = 1166119032. Its totient is φ = 1162343952.

The previous prime is 1164231433. The next prime is 1164231499. The reversal of 1164231491 is 1941324611.

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 1164231491 - 2⁶ = 1164231427 is a prime.

It is a super-3 number, since 3×1164231491³ (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 (1164231499) 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, 942845 + ... + 944078.

It is an arithmetic number, because the mean of its divisors is an integer number (291529758).

Almost surely, 2^1164231491 is an apocalyptic number.

1164231491 is a deficient number, since it is larger than the sum of its proper divisors (1887541).

1164231491 is an equidigital number, since it uses as much as digits as its factorization.

1164231491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1887540.

The product of its digits is 5184, while the sum is 32.

The square root of 1164231491 is about 34120.8366104936. The cubic root of 1164231491 is about 1051.9936396339.

The spelling of 1164231491 in words is "one billion, one hundred sixty-four million, two hundred thirty-one thousand, four hundred ninety-one".