88421779 has 2 divisors, whose sum is σ = 88421780. Its totient is φ = 88421778.

The previous prime is 88421747. The next prime is 88421807. The reversal of 88421779 is 97712488.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 88421779 - 2⁵ = 88421747 is a prime.

It is a super-2 number, since 2×88421779² = 15636822003049682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (88421279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44210889 + 44210890.

It is an arithmetic number, because the mean of its divisors is an integer number (44210890).

Almost surely, 2^88421779 is an apocalyptic number.

88421779 is a deficient number, since it is larger than the sum of its proper divisors (1).

88421779 is an equidigital number, since it uses as much as digits as its factorization.

88421779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 46.

The square root of 88421779 is about 9403.2855428302. The cubic root of 88421779 is about 445.5055131426.

The spelling of 88421779 in words is "eighty-eight million, four hundred twenty-one thousand, seven hundred seventy-nine".