28423284091 has 2 divisors, whose sum is σ = 28423284092. Its totient is φ = 28423284090.

The previous prime is 28423284089. The next prime is 28423284121. The reversal of 28423284091 is 19048232482.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28423284091 - 2¹ = 28423284089 is a prime.

Together with 28423284089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28423282091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14211642045 + 14211642046.

It is an arithmetic number, because the mean of its divisors is an integer number (14211642046).

Almost surely, 2^28423284091 is an apocalyptic number.

28423284091 is a deficient number, since it is larger than the sum of its proper divisors (1).

28423284091 is an equidigital number, since it uses as much as digits as its factorization.

28423284091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221184, while the sum is 43.

The spelling of 28423284091 in words is "twenty-eight billion, four hundred twenty-three million, two hundred eighty-four thousand, ninety-one".