88419509 has 2 divisors, whose sum is σ = 88419510. Its totient is φ = 88419508.

The previous prime is 88419503. The next prime is 88419511. The reversal of 88419509 is 90591488.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87478609 + 940900 = 9353^2 + 970^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-88419509 is a prime.

Together with 88419511, 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 88419509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88419503) 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, 44209754 + 44209755.

It is an arithmetic number, because the mean of its divisors is an integer number (44209755).

Almost surely, 2^88419509 is an apocalyptic number.

It is an amenable number.

88419509 is a deficient number, since it is larger than the sum of its proper divisors (1).

88419509 is an equidigital number, since it uses as much as digits as its factorization.

88419509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 88419509 is about 9403.1648395633. The cubic root of 88419509 is about 445.5017007102.

The spelling of 88419509 in words is "eighty-eight million, four hundred nineteen thousand, five hundred nine".