88777921 has 2 divisors, whose sum is σ = 88777922. Its totient is φ = 88777920.

The previous prime is 88777873. The next prime is 88777957. The reversal of 88777921 is 12977788.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68707521 + 20070400 = 8289^2 + 4480^2 .

It is a cyclic number.

It is not a de Polignac number, because 88777921 - 2¹⁷ = 88646849 is a prime.

It is not a weakly prime, because it can be changed into another prime (88777981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44388960 + 44388961.

It is an arithmetic number, because the mean of its divisors is an integer number (44388961).

Almost surely, 2^88777921 is an apocalyptic number.

It is an amenable number.

88777921 is a deficient number, since it is larger than the sum of its proper divisors (1).

88777921 is an equidigital number, since it uses as much as digits as its factorization.

88777921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 395136, while the sum is 49.

The square root of 88777921 is about 9422.2036169890. The cubic root of 88777921 is about 446.1028421504.

It can be divided in two parts, 88777 and 921, that added together give a palindrome (89698).

The spelling of 88777921 in words is "eighty-eight million, seven hundred seventy-seven thousand, nine hundred twenty-one".