88777789 has 2 divisors, whose sum is σ = 88777790. Its totient is φ = 88777788.

The previous prime is 88777727. The next prime is 88777807. The reversal of 88777789 is 98777788.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76422564 + 12355225 = 8742^2 + 3515^2 .

It is a cyclic number.

It is not a de Polignac number, because 88777789 - 2¹¹ = 88775741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88727789) 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, 44388894 + 44388895.

It is an arithmetic number, because the mean of its divisors is an integer number (44388895).

Almost surely, 2^88777789 is an apocalyptic number.

It is an amenable number.

88777789 is a deficient number, since it is larger than the sum of its proper divisors (1).

88777789 is an equidigital number, since it uses as much as digits as its factorization.

88777789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11063808, while the sum is 61.

The square root of 88777789 is about 9422.1966122556. The cubic root of 88777789 is about 446.1026210533.

Subtracting 88777789 from its reverse (98777788), we obtain a palindrome (9999999).

The spelling of 88777789 in words is "eighty-eight million, seven hundred seventy-seven thousand, seven hundred eighty-nine".