88181909 has 2 divisors, whose sum is σ = 88181910. Its totient is φ = 88181908.

The previous prime is 88181903. The next prime is 88181911. The reversal of 88181909 is 90918188.

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., 88078225 + 103684 = 9385^2 + 322^2 .

It is a cyclic number.

It is not a de Polignac number, because 88181909 - 2¹⁶ = 88116373 is a prime.

Together with 88181911, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 88181909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88181903) 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, 44090954 + 44090955.

It is an arithmetic number, because the mean of its divisors is an integer number (44090955).

Almost surely, 2^88181909 is an apocalyptic number.

It is an amenable number.

88181909 is a deficient number, since it is larger than the sum of its proper divisors (1).

88181909 is an equidigital number, since it uses as much as digits as its factorization.

88181909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 44.

The square root of 88181909 is about 9390.5222964434. The cubic root of 88181909 is about 445.1022935312.

The spelling of 88181909 in words is "eighty-eight million, one hundred eighty-one thousand, nine hundred nine".