28420060091 has 2 divisors, whose sum is σ = 28420060092. Its totient is φ = 28420060090.

The previous prime is 28420060007. The next prime is 28420060139. The reversal of 28420060091 is 19006002482.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28420060091 - 2²⁶ = 28352951227 is a prime.

It is not a weakly prime, because it can be changed into another prime (28420030091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14210030045 + 14210030046.

It is an arithmetic number, because the mean of its divisors is an integer number (14210030046).

Almost surely, 2^28420060091 is an apocalyptic number.

28420060091 is a deficient number, since it is larger than the sum of its proper divisors (1).

28420060091 is an equidigital number, since it uses as much as digits as its factorization.

28420060091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 32.

The spelling of 28420060091 in words is "twenty-eight billion, four hundred twenty million, sixty thousand, ninety-one".