2318578891 has 2 divisors, whose sum is σ = 2318578892. Its totient is φ = 2318578890.

The previous prime is 2318578831. The next prime is 2318578901. The reversal of 2318578891 is 1988758132.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2318578891 - 2¹³ = 2318570699 is a prime.

It is not a weakly prime, because it can be changed into another prime (2318578831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1159289445 + 1159289446.

It is an arithmetic number, because the mean of its divisors is an integer number (1159289446).

Almost surely, 2^2318578891 is an apocalyptic number.

2318578891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2318578891 is an equidigital number, since it uses as much as digits as its factorization.

2318578891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 967680, while the sum is 52.

The square root of 2318578891 is about 48151.6239705371. The cubic root of 2318578891 is about 1323.5508335040.

The spelling of 2318578891 in words is "two billion, three hundred eighteen million, five hundred seventy-eight thousand, eight hundred ninety-one".