88609891 has 2 divisors, whose sum is σ = 88609892. Its totient is φ = 88609890.

The previous prime is 88609889. The next prime is 88609907. The reversal of 88609891 is 19890688.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 88609891 - 2¹ = 88609889 is a prime.

Together with 88609889, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (88609291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44304945 + 44304946.

It is an arithmetic number, because the mean of its divisors is an integer number (44304946).

Almost surely, 2^88609891 is an apocalyptic number.

88609891 is a deficient number, since it is larger than the sum of its proper divisors (1).

88609891 is an equidigital number, since it uses as much as digits as its factorization.

88609891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 49.

The square root of 88609891 is about 9413.2826899015. The cubic root of 88609891 is about 445.8212180673.

The spelling of 88609891 in words is "eighty-eight million, six hundred nine thousand, eight hundred ninety-one".