87438319 has 2 divisors, whose sum is σ = 87438320. Its totient is φ = 87438318.

The previous prime is 87438269. The next prime is 87438349. The reversal of 87438319 is 91383478.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87438319 - 2⁹ = 87437807 is a prime.

It is a super-2 number, since 2×87438319² = 15290919259091522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87438349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43719159 + 43719160.

It is an arithmetic number, because the mean of its divisors is an integer number (43719160).

Almost surely, 2^87438319 is an apocalyptic number.

87438319 is a deficient number, since it is larger than the sum of its proper divisors (1).

87438319 is an equidigital number, since it uses as much as digits as its factorization.

87438319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 43.

The square root of 87438319 is about 9350.8458975646. The cubic root of 87438319 is about 443.8476586225.

It can be divided in two parts, 874 and 38319, that added together give a palindrome (39193).

The spelling of 87438319 in words is "eighty-seven million, four hundred thirty-eight thousand, three hundred nineteen".