88644389 has 2 divisors, whose sum is σ = 88644390. Its totient is φ = 88644388.

The previous prime is 88644317. The next prime is 88644427. The reversal of 88644389 is 98344688.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65044225 + 23600164 = 8065^2 + 4858^2 .

It is a cyclic number.

It is not a de Polignac number, because 88644389 - 2⁸ = 88644133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88644289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44322194 + 44322195.

It is an arithmetic number, because the mean of its divisors is an integer number (44322195).

Almost surely, 2^88644389 is an apocalyptic number.

It is an amenable number.

88644389 is a deficient number, since it is larger than the sum of its proper divisors (1).

88644389 is an equidigital number, since it uses as much as digits as its factorization.

88644389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1327104, while the sum is 50.

The square root of 88644389 is about 9415.1149222938. The cubic root of 88644389 is about 445.8790669324.

The spelling of 88644389 in words is "eighty-eight million, six hundred forty-four thousand, three hundred eighty-nine".