28968091 has 2 divisors, whose sum is σ = 28968092. Its totient is φ = 28968090.

The previous prime is 28968083. The next prime is 28968101. The reversal of 28968091 is 19086982.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28968091 - 2³ = 28968083 is a prime.

It is not a weakly prime, because it can be changed into another prime (28968001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14484045 + 14484046.

It is an arithmetic number, because the mean of its divisors is an integer number (14484046).

Almost surely, 2^28968091 is an apocalyptic number.

28968091 is a deficient number, since it is larger than the sum of its proper divisors (1).

28968091 is an equidigital number, since it uses as much as digits as its factorization.

28968091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 28968091 is about 5382.2013154471. The cubic root of 28968091 is about 307.1189578149.

The spelling of 28968091 in words is "twenty-eight million, nine hundred sixty-eight thousand, ninety-one".