87438519 has 12 divisors (see below), whose sum is σ = 144343056. Its totient is φ = 49964832.

The previous prime is 87438503. The next prime is 87438521. The reversal of 87438519 is 91583478.

It is not a de Polignac number, because 87438519 - 2⁴ = 87438503 is a prime.

It is a super-2 number, since 2×87438519² = 15290989209826722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87438529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 693894 + ... + 694019.

It is an arithmetic number, because the mean of its divisors is an integer number (12028588).

Almost surely, 2^87438519 is an apocalyptic number.

87438519 is a deficient number, since it is larger than the sum of its proper divisors (56904537).

87438519 is a wasteful number, since it uses less digits than its factorization.

87438519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1387926 (or 1387923 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 87438519 is about 9350.8565917781. The cubic root of 87438519 is about 443.8479970304.

It can be divided in two parts, 874 and 38519, that added together give a palindrome (39393).

The spelling of 87438519 in words is "eighty-seven million, four hundred thirty-eight thousand, five hundred nineteen".