1168427389 has 4 divisors (see below), whose sum is σ = 1196925660. Its totient is φ = 1139929120.

The previous prime is 1168427369. The next prime is 1168427419. The reversal of 1168427389 is 9837248611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9837248611 = 17 ⋅578661683.

It can be written as a sum of positive squares in 2 ways, for example, as 308002500 + 860424889 = 17550^2 + 29333^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1168427389 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1168427369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14249074 + ... + 14249155.

It is an arithmetic number, because the mean of its divisors is an integer number (299231415).

Almost surely, 2^1168427389 is an apocalyptic number.

It is an amenable number.

1168427389 is a deficient number, since it is larger than the sum of its proper divisors (28498271).

1168427389 is an equidigital number, since it uses as much as digits as its factorization.

1168427389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28498270.

The product of its digits is 580608, while the sum is 49.

The square root of 1168427389 is about 34182.2671717369. The cubic root of 1168427389 is about 1053.2559217688.

The spelling of 1168427389 in words is "one billion, one hundred sixty-eight million, four hundred twenty-seven thousand, three hundred eighty-nine".