1151818489 has 4 divisors (see below), whose sum is σ = 1152981760. Its totient is φ = 1150655220.

The previous prime is 1151818477. The next prime is 1151818501. The reversal of 1151818489 is 9848181511.

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.

It is an interprime number because it is at equal distance from previous prime (1151818477) and next prime (1151818501).

It is a cyclic number.

It is not a de Polignac number, because 1151818489 - 2²¹ = 1149721337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1151818439) 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, 580149 + ... + 582130.

It is an arithmetic number, because the mean of its divisors is an integer number (288245440).

Almost surely, 2^1151818489 is an apocalyptic number.

It is an amenable number.

1151818489 is a deficient number, since it is larger than the sum of its proper divisors (1163271).

1151818489 is an equidigital number, since it uses as much as digits as its factorization.

1151818489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163270.

The product of its digits is 92160, while the sum is 46.

The square root of 1151818489 is about 33938.4514820579. The cubic root of 1151818489 is about 1048.2414976862.

The spelling of 1151818489 in words is "one billion, one hundred fifty-one million, eight hundred eighteen thousand, four hundred eighty-nine".